diff --git a/keyboards/skyloong/gk87/bl/ansi/keyboard.json b/keyboards/skyloong/gk87/bl/ansi/keyboard.json
new file mode 100644
index 00000000000..4561792d7bf
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/ansi/keyboard.json
@@ -0,0 +1,301 @@
+{
+    "keyboard_name": "GK87 Backlight_ansi_1.0.0",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x6A87"
+    },
+    "community_layouts": ["tkl_ansi"],
+    "layouts": {
+        "LAYOUT_all": {
+            "layout": [
+                {"label": "ESC", "matrix": [0, 0], "x": 0, "y": 0},
+                {"label": "F1", "matrix": [0, 2], "x": 2, "y": 0},
+                {"label": "F2", "matrix": [0, 3], "x": 3, "y": 0},
+                {"label": "F3", "matrix": [0, 4], "x": 4, "y": 0},
+                {"label": "F4", "matrix": [0, 5], "x": 5, "y": 0},
+                {"label": "F5", "matrix": [0, 6], "x": 6.5, "y": 0},
+                {"label": "F6", "matrix": [0, 7], "x": 7.5, "y": 0},
+                {"label": "F7", "matrix": [0, 8], "x": 8.5, "y": 0},
+                {"label": "F8", "matrix": [0, 9], "x": 9.5, "y": 0},
+                {"label": "F9", "matrix": [0, 10], "x": 11, "y": 0},
+                {"label": "F10", "matrix": [0, 11], "x": 12, "y": 0},
+                {"label": "F11", "matrix": [0, 12], "x": 13, "y": 0},
+                {"label": "F12", "matrix": [0, 13], "x": 14, "y": 0},
+                {"label": "PrtSc", "matrix": [0, 14], "x": 15.25, "y": 0},
+                {"label": "SL", "matrix": [0, 15], "x": 16.25, "y": 0},
+                {"label": "PB", "matrix": [3, 13], "x": 17.25, "y": 0},
+
+                {"label": "~", "matrix": [1, 0], "x": 0, "y": 1.25},
+                {"label": "1", "matrix": [1, 1], "x": 1, "y": 1.25},
+                {"label": "2", "matrix": [1, 2], "x": 2, "y": 1.25},
+                {"label": "3", "matrix": [1, 3], "x": 3, "y": 1.25},
+                {"label": "4", "matrix": [1, 4], "x": 4, "y": 1.25},
+                {"label": "5", "matrix": [1, 5], "x": 5, "y": 1.25},
+                {"label": "6", "matrix": [1, 6], "x": 6, "y": 1.25},
+                {"label": "7", "matrix": [1, 7], "x": 7, "y": 1.25},
+                {"label": "8", "matrix": [1, 8], "x": 8, "y": 1.25},
+                {"label": "9", "matrix": [1, 9], "x": 9, "y": 1.25},
+                {"label": "0", "matrix": [1, 10], "x": 10, "y": 1.25},
+                {"label": "-_", "matrix": [1, 11], "x": 11, "y": 1.25},
+                {"label": "=+", "matrix": [1, 12], "x": 12, "y": 1.25},
+                {"label": "BS", "matrix": [1, 13], "x": 13, "y": 1.25, "w": 2},
+                {"label": "Ins", "matrix": [1, 14], "x": 15.25, "y": 1.25},
+                {"label": "Home", "matrix": [1, 15], "x": 16.25, "y": 1.25},
+                {"label": "PgUp", "matrix": [3, 15], "x": 17.25, "y": 1.25},
+
+                {"label": "Tab", "matrix": [2, 0], "x": 0, "y": 2.25, "w": 1.5},
+                {"label": "Q", "matrix": [2, 1], "x": 1.5, "y": 2.25},
+                {"label": "W", "matrix": [2, 2], "x": 2.5, "y": 2.25},
+                {"label": "E", "matrix": [2, 3], "x": 3.5, "y": 2.25},
+                {"label": "R", "matrix": [2, 4], "x": 4.5, "y": 2.25},
+                {"label": "T", "matrix": [2, 5], "x": 5.5, "y": 2.25},
+                {"label": "Y", "matrix": [2, 6], "x": 6.5, "y": 2.25},
+                {"label": "U", "matrix": [2, 7], "x": 7.5, "y": 2.25},
+                {"label": "I", "matrix": [2, 8], "x": 8.5, "y": 2.25},
+                {"label": "O", "matrix": [2, 9], "x": 9.5, "y": 2.25},
+                {"label": "P", "matrix": [2, 10], "x": 10.5, "y": 2.25},
+                {"label": "[", "matrix": [2, 11], "x": 11.5, "y": 2.25},
+                {"label": "]", "matrix": [2, 12], "x": 12.5, "y": 2.25},
+                {"label": "|", "matrix": [2, 13], "x": 13.5, "y": 2.25, "w": 1.5},
+                {"label": "Del", "matrix": [2, 14], "x": 15.25, "y": 2.25},
+                {"label": "End", "matrix": [2, 15], "x": 16.25, "y": 2.25},
+                {"label": "PgDn", "matrix": [4, 15], "x": 17.25, "y": 2.25},
+
+                {"label": "Cap", "matrix": [3, 0], "x": 0, "y": 3.25, "w": 1.75},
+                {"label": "A", "matrix": [3, 1], "x": 1.75, "y": 3.25},
+                {"label": "S", "matrix": [3, 2], "x": 2.75, "y": 3.25},
+                {"label": "D", "matrix": [3, 3], "x": 3.75, "y": 3.25},
+                {"label": "F", "matrix": [3, 4], "x": 4.75, "y": 3.25},
+                {"label": "G", "matrix": [3, 5], "x": 5.75, "y": 3.25},
+                {"label": "H", "matrix": [3, 6], "x": 6.75, "y": 3.25},
+                {"label": "J", "matrix": [3, 7], "x": 7.75, "y": 3.25},
+                {"label": "K", "matrix": [3, 8], "x": 8.75, "y": 3.25},
+                {"label": "L", "matrix": [3, 9], "x": 9.75, "y": 3.25},
+                {"label": ";", "matrix": [3, 10], "x": 10.75, "y": 3.25},
+                {"label": "'", "matrix": [3, 11], "x": 11.75, "y": 3.25},
+                {"label": "Ent", "matrix": [3, 12], "x": 12.75, "y": 3.25, "w": 2.25},
+
+                {"label": "Shift", "matrix": [4, 0], "x": 0, "y": 4.25, "w": 2.25},
+                {"label": "Z", "matrix": [4, 1], "x": 2.25, "y": 4.25},
+                {"label": "X", "matrix": [4, 2], "x": 3.25, "y": 4.25},
+                {"label": "C", "matrix": [4, 3], "x": 4.25, "y": 4.25},
+                {"label": "V", "matrix": [4, 4], "x": 5.25, "y": 4.25},
+                {"label": "B", "matrix": [4, 5], "x": 6.25, "y": 4.25},
+                {"label": "N", "matrix": [4, 6], "x": 7.25, "y": 4.25},
+                {"label": "M", "matrix": [4, 7], "x": 8.25, "y": 4.25},
+                {"label": ",", "matrix": [4, 8], "x": 9.25, "y": 4.25},
+                {"label": ".", "matrix": [4, 9], "x": 10.25, "y": 4.25},
+                {"label": "?", "matrix": [4, 10], "x": 11.25, "y": 4.25},
+                {"label": "Shift", "matrix": [4, 12], "x": 12.25, "y": 4.25, "w": 2.75},
+                {"label": "Up", "matrix": [4, 14], "x": 16.25, "y": 4.25},
+
+                {"label": "Ctrl", "matrix": [5, 0], "x": 0, "y": 5.25, "w": 1.25},
+                {"label": "Com", "matrix": [5, 1], "x": 1.25, "y": 5.25, "w": 1.25},
+                {"label": "Alt", "matrix": [5, 2], "x": 2.5, "y": 5.25, "w": 1.25},
+                {"label": "SPAC1", "matrix": [5, 4], "x": 3.75, "y": 5.25, "w": 2.5},
+                {"label": "SPAC", "matrix": [5, 5], "x": 6.25, "y": 5.25, "w": 1.25},
+                {"label": "SPAC2", "matrix": [5, 8], "x": 7.5, "y": 5.25, "w": 2.5},
+                {"label": "Alt", "matrix": [5, 9], "x": 10, "y": 5.25, "w": 1.25},
+                {"label": "Menu", "matrix": [5, 10], "x": 11.25, "y": 5.25, "w": 1.25},
+                {"label": "Ctrl", "matrix": [5, 11], "x": 12.5, "y": 5.25, "w": 1.25},
+                {"label": "Fn", "matrix": [5, 12], "x": 13.75, "y": 5.25, "w": 1.25},
+                {"label": "Left", "matrix": [5, 13], "x": 15.25, "y": 5.25},
+                {"label": "Down", "matrix": [5, 14], "x": 16.25, "y": 5.25},
+                {"label": "Right", "matrix": [5, 15], "x": 17.25, "y": 5.25}
+            ]
+        },
+        "LAYOUT_tkl_ansi": {
+            "layout": [
+                {"label": "ESC", "matrix": [0, 0], "x": 0, "y": 0},
+                {"label": "F1", "matrix": [0, 2], "x": 2, "y": 0},
+                {"label": "F2", "matrix": [0, 3], "x": 3, "y": 0},
+                {"label": "F3", "matrix": [0, 4], "x": 4, "y": 0},
+                {"label": "F4", "matrix": [0, 5], "x": 5, "y": 0},
+                {"label": "F5", "matrix": [0, 6], "x": 6.5, "y": 0},
+                {"label": "F6", "matrix": [0, 7], "x": 7.5, "y": 0},
+                {"label": "F7", "matrix": [0, 8], "x": 8.5, "y": 0},
+                {"label": "F8", "matrix": [0, 9], "x": 9.5, "y": 0},
+                {"label": "F9", "matrix": [0, 10], "x": 11, "y": 0},
+                {"label": "F10", "matrix": [0, 11], "x": 12, "y": 0},
+                {"label": "F11", "matrix": [0, 12], "x": 13, "y": 0},
+                {"label": "F12", "matrix": [0, 13], "x": 14, "y": 0},
+                {"label": "PrtSc", "matrix": [0, 14], "x": 15.25, "y": 0},
+                {"label": "SL", "matrix": [0, 15], "x": 16.25, "y": 0},
+                {"label": "PB", "matrix": [3, 13], "x": 17.25, "y": 0},
+
+                {"label": "~", "matrix": [1, 0], "x": 0, "y": 1.25},
+                {"label": "1", "matrix": [1, 1], "x": 1, "y": 1.25},
+                {"label": "2", "matrix": [1, 2], "x": 2, "y": 1.25},
+                {"label": "3", "matrix": [1, 3], "x": 3, "y": 1.25},
+                {"label": "4", "matrix": [1, 4], "x": 4, "y": 1.25},
+                {"label": "5", "matrix": [1, 5], "x": 5, "y": 1.25},
+                {"label": "6", "matrix": [1, 6], "x": 6, "y": 1.25},
+                {"label": "7", "matrix": [1, 7], "x": 7, "y": 1.25},
+                {"label": "8", "matrix": [1, 8], "x": 8, "y": 1.25},
+                {"label": "9", "matrix": [1, 9], "x": 9, "y": 1.25},
+                {"label": "0", "matrix": [1, 10], "x": 10, "y": 1.25},
+                {"label": "-_", "matrix": [1, 11], "x": 11, "y": 1.25},
+                {"label": "=+", "matrix": [1, 12], "x": 12, "y": 1.25},
+                {"label": "BS", "matrix": [1, 13], "x": 13, "y": 1.25, "w": 2},
+                {"label": "Ins", "matrix": [1, 14], "x": 15.25, "y": 1.25},
+                {"label": "Home", "matrix": [1, 15], "x": 16.25, "y": 1.25},
+                {"label": "PgUp", "matrix": [3, 15], "x": 17.25, "y": 1.25},
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+                {"label": "Tab", "matrix": [2, 0], "x": 0, "y": 2.25, "w": 1.5},
+                {"label": "Q", "matrix": [2, 1], "x": 1.5, "y": 2.25},
+                {"label": "W", "matrix": [2, 2], "x": 2.5, "y": 2.25},
+                {"label": "E", "matrix": [2, 3], "x": 3.5, "y": 2.25},
+                {"label": "R", "matrix": [2, 4], "x": 4.5, "y": 2.25},
+                {"label": "T", "matrix": [2, 5], "x": 5.5, "y": 2.25},
+                {"label": "Y", "matrix": [2, 6], "x": 6.5, "y": 2.25},
+                {"label": "U", "matrix": [2, 7], "x": 7.5, "y": 2.25},
+                {"label": "I", "matrix": [2, 8], "x": 8.5, "y": 2.25},
+                {"label": "O", "matrix": [2, 9], "x": 9.5, "y": 2.25},
+                {"label": "P", "matrix": [2, 10], "x": 10.5, "y": 2.25},
+                {"label": "[", "matrix": [2, 11], "x": 11.5, "y": 2.25},
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+                {"label": "|", "matrix": [2, 13], "x": 13.5, "y": 2.25, "w": 1.5},
+                {"label": "Del", "matrix": [2, 14], "x": 15.25, "y": 2.25},
+                {"label": "End", "matrix": [2, 15], "x": 16.25, "y": 2.25},
+                {"label": "PgDn", "matrix": [4, 15], "x": 17.25, "y": 2.25},
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+                {"label": "Cap", "matrix": [3, 0], "x": 0, "y": 3.25, "w": 1.75},
+                {"label": "A", "matrix": [3, 1], "x": 1.75, "y": 3.25},
+                {"label": "S", "matrix": [3, 2], "x": 2.75, "y": 3.25},
+                {"label": "D", "matrix": [3, 3], "x": 3.75, "y": 3.25},
+                {"label": "F", "matrix": [3, 4], "x": 4.75, "y": 3.25},
+                {"label": "G", "matrix": [3, 5], "x": 5.75, "y": 3.25},
+                {"label": "H", "matrix": [3, 6], "x": 6.75, "y": 3.25},
+                {"label": "J", "matrix": [3, 7], "x": 7.75, "y": 3.25},
+                {"label": "K", "matrix": [3, 8], "x": 8.75, "y": 3.25},
+                {"label": "L", "matrix": [3, 9], "x": 9.75, "y": 3.25},
+                {"label": ";", "matrix": [3, 10], "x": 10.75, "y": 3.25},
+                {"label": "'", "matrix": [3, 11], "x": 11.75, "y": 3.25},
+                {"label": "Ent", "matrix": [3, 12], "x": 12.75, "y": 3.25, "w": 2.25},
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+                {"label": "Shift", "matrix": [4, 0], "x": 0, "y": 4.25, "w": 2.25},
+                {"label": "Z", "matrix": [4, 1], "x": 2.25, "y": 4.25},
+                {"label": "X", "matrix": [4, 2], "x": 3.25, "y": 4.25},
+                {"label": "C", "matrix": [4, 3], "x": 4.25, "y": 4.25},
+                {"label": "V", "matrix": [4, 4], "x": 5.25, "y": 4.25},
+                {"label": "B", "matrix": [4, 5], "x": 6.25, "y": 4.25},
+                {"label": "N", "matrix": [4, 6], "x": 7.25, "y": 4.25},
+                {"label": "M", "matrix": [4, 7], "x": 8.25, "y": 4.25},
+                {"label": ",", "matrix": [4, 8], "x": 9.25, "y": 4.25},
+                {"label": ".", "matrix": [4, 9], "x": 10.25, "y": 4.25},
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+                {"label": "Shift", "matrix": [4, 12], "x": 12.25, "y": 4.25, "w": 2.75},
+                {"label": "Up", "matrix": [4, 14], "x": 16.25, "y": 4.25},
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+                {"label": "Ctrl", "matrix": [5, 0], "x": 0, "y": 5.25, "w": 1.25},
+                {"label": "Com", "matrix": [5, 1], "x": 1.25, "y": 5.25, "w": 1.25},
+                {"label": "Alt", "matrix": [5, 2], "x": 2.5, "y": 5.25, "w": 1.25},
+                {"label": "SPAC", "matrix": [5, 5], "x": 3.75, "y": 5.25, "w": 6.25},
+                {"label": "Alt", "matrix": [5, 9], "x": 10, "y": 5.25, "w": 1.25},
+                {"label": "Menu", "matrix": [5, 10], "x": 11.25, "y": 5.25, "w": 1.25},
+                {"label": "Ctrl", "matrix": [5, 11], "x": 12.5, "y": 5.25, "w": 1.25},
+                {"label": "Fn", "matrix": [5, 12], "x": 13.75, "y": 5.25, "w": 1.25},
+                {"label": "Left", "matrix": [5, 13], "x": 15.25, "y": 5.25},
+                {"label": "Down", "matrix": [5, 14], "x": 16.25, "y": 5.25},
+                {"label": "Right", "matrix": [5, 15], "x": 17.25, "y": 5.25}
+            ]
+        },
+        "LAYOUT_ansi_split_space": {
+            "layout": [
+                {"label": "ESC", "matrix": [0, 0], "x": 0, "y": 0},
+                {"label": "F1", "matrix": [0, 2], "x": 2, "y": 0},
+                {"label": "F2", "matrix": [0, 3], "x": 3, "y": 0},
+                {"label": "F3", "matrix": [0, 4], "x": 4, "y": 0},
+                {"label": "F4", "matrix": [0, 5], "x": 5, "y": 0},
+                {"label": "F5", "matrix": [0, 6], "x": 6.5, "y": 0},
+                {"label": "F6", "matrix": [0, 7], "x": 7.5, "y": 0},
+                {"label": "F7", "matrix": [0, 8], "x": 8.5, "y": 0},
+                {"label": "F8", "matrix": [0, 9], "x": 9.5, "y": 0},
+                {"label": "F9", "matrix": [0, 10], "x": 11, "y": 0},
+                {"label": "F10", "matrix": [0, 11], "x": 12, "y": 0},
+                {"label": "F11", "matrix": [0, 12], "x": 13, "y": 0},
+                {"label": "F12", "matrix": [0, 13], "x": 14, "y": 0},
+                {"label": "PrtSc", "matrix": [0, 14], "x": 15.25, "y": 0},
+                {"label": "SL", "matrix": [0, 15], "x": 16.25, "y": 0},
+                {"label": "PB", "matrix": [3, 13], "x": 17.25, "y": 0},
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+                {"label": "~", "matrix": [1, 0], "x": 0, "y": 1.25},
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+                {"label": "Ins", "matrix": [1, 14], "x": 15.25, "y": 1.25},
+                {"label": "Home", "matrix": [1, 15], "x": 16.25, "y": 1.25},
+                {"label": "PgUp", "matrix": [3, 15], "x": 17.25, "y": 1.25},
+
+                {"label": "Tab", "matrix": [2, 0], "x": 0, "y": 2.25, "w": 1.5},
+                {"label": "Q", "matrix": [2, 1], "x": 1.5, "y": 2.25},
+                {"label": "W", "matrix": [2, 2], "x": 2.5, "y": 2.25},
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+                {"label": "P", "matrix": [2, 10], "x": 10.5, "y": 2.25},
+                {"label": "[", "matrix": [2, 11], "x": 11.5, "y": 2.25},
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+                {"label": "|", "matrix": [2, 13], "x": 13.5, "y": 2.25, "w": 1.5},
+                {"label": "Del", "matrix": [2, 14], "x": 15.25, "y": 2.25},
+                {"label": "End", "matrix": [2, 15], "x": 16.25, "y": 2.25},
+                {"label": "PgDn", "matrix": [4, 15], "x": 17.25, "y": 2.25},
+
+                {"label": "Cap", "matrix": [3, 0], "x": 0, "y": 3.25, "w": 1.75},
+                {"label": "A", "matrix": [3, 1], "x": 1.75, "y": 3.25},
+                {"label": "S", "matrix": [3, 2], "x": 2.75, "y": 3.25},
+                {"label": "D", "matrix": [3, 3], "x": 3.75, "y": 3.25},
+                {"label": "F", "matrix": [3, 4], "x": 4.75, "y": 3.25},
+                {"label": "G", "matrix": [3, 5], "x": 5.75, "y": 3.25},
+                {"label": "H", "matrix": [3, 6], "x": 6.75, "y": 3.25},
+                {"label": "J", "matrix": [3, 7], "x": 7.75, "y": 3.25},
+                {"label": "K", "matrix": [3, 8], "x": 8.75, "y": 3.25},
+                {"label": "L", "matrix": [3, 9], "x": 9.75, "y": 3.25},
+                {"label": ";", "matrix": [3, 10], "x": 10.75, "y": 3.25},
+                {"label": "'", "matrix": [3, 11], "x": 11.75, "y": 3.25},
+                {"label": "Ent", "matrix": [3, 12], "x": 12.75, "y": 3.25, "w": 2.25},
+
+                {"label": "Shift", "matrix": [4, 0], "x": 0, "y": 4.25, "w": 2.25},
+                {"label": "Z", "matrix": [4, 1], "x": 2.25, "y": 4.25},
+                {"label": "X", "matrix": [4, 2], "x": 3.25, "y": 4.25},
+                {"label": "C", "matrix": [4, 3], "x": 4.25, "y": 4.25},
+                {"label": "V", "matrix": [4, 4], "x": 5.25, "y": 4.25},
+                {"label": "B", "matrix": [4, 5], "x": 6.25, "y": 4.25},
+                {"label": "N", "matrix": [4, 6], "x": 7.25, "y": 4.25},
+                {"label": "M", "matrix": [4, 7], "x": 8.25, "y": 4.25},
+                {"label": ",", "matrix": [4, 8], "x": 9.25, "y": 4.25},
+                {"label": ".", "matrix": [4, 9], "x": 10.25, "y": 4.25},
+                {"label": "?", "matrix": [4, 10], "x": 11.25, "y": 4.25},
+                {"label": "Shift", "matrix": [4, 12], "x": 12.25, "y": 4.25, "w": 2.75},
+                {"label": "Up", "matrix": [4, 14], "x": 16.25, "y": 4.25},
+
+                {"label": "Ctrl", "matrix": [5, 0], "x": 0, "y": 5.25, "w": 1.25},
+                {"label": "Com", "matrix": [5, 1], "x": 1.25, "y": 5.25, "w": 1.25},
+                {"label": "Alt", "matrix": [5, 2], "x": 2.5, "y": 5.25, "w": 1.25},
+                {"label": "SPAC1", "matrix": [5, 4], "x": 3.75, "y": 5.25, "w": 3.25},
+                {"label": "SPAC2", "matrix": [5, 8], "x": 7, "y": 5.25, "w": 3},
+                {"label": "Alt", "matrix": [5, 9], "x": 10, "y": 5.25, "w": 1.25},
+                {"label": "Menu", "matrix": [5, 10], "x": 11.25, "y": 5.25, "w": 1.25},
+                {"label": "Ctrl", "matrix": [5, 11], "x": 12.5, "y": 5.25, "w": 1.25},
+                {"label": "Fn", "matrix": [5, 12], "x": 13.75, "y": 5.25, "w": 1.25},
+                {"label": "Left", "matrix": [5, 13], "x": 15.25, "y": 5.25},
+                {"label": "Down", "matrix": [5, 14], "x": 16.25, "y": 5.25},
+                {"label": "Right", "matrix": [5, 15], "x": 17.25, "y": 5.25}
+            ]
+        }
+    }
+}
diff --git a/keyboards/skyloong/gk87/bl/ansi/keymaps/default/keymap.c b/keyboards/skyloong/gk87/bl/ansi/keymaps/default/keymap.c
new file mode 100644
index 00000000000..aecce95bfd6
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/ansi/keymaps/default/keymap.c
@@ -0,0 +1,32 @@
+// Copyright 2023 JZ-Skyloong (@JZ-Skyloong)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [0] = LAYOUT_all(
+         KC_ESC,              KC_F1,    KC_F2,    KC_F3,    KC_F4,       KC_F5,     KC_F6,     KC_F7,    KC_F8,     KC_F9,    KC_F10,   KC_F11,       KC_F12,   KC_MUTE,  BL_TOGG, LSG(KC_S),
+         KC_GRV,     KC_1,     KC_2,     KC_3,     KC_4,     KC_5,        KC_6,     KC_7,       KC_8,     KC_9,      KC_0,   KC_MINS,   KC_EQL,      KC_BSPC,    KC_INS,  KC_HOME,   KC_PGUP,
+         KC_TAB,     KC_Q,     KC_W,     KC_E,     KC_R,     KC_T,        KC_Y,     KC_U,       KC_I,     KC_O,      KC_P,   KC_LBRC,  KC_RBRC,      KC_BSLS,    KC_DEL,   KC_END,   KC_PGDN,
+        KC_CAPS,     KC_A,     KC_S,     KC_D,     KC_F,     KC_G,        KC_H,     KC_J,       KC_K,     KC_L,   KC_SCLN,   KC_QUOT,                 KC_ENT,
+        KC_LSFT,     KC_Z,     KC_X,     KC_C,     KC_V,     KC_B,        KC_N,     KC_M,    KC_COMM,   KC_DOT,   KC_SLSH,                           KC_RSFT,               KC_UP,
+        KC_LCTL,  KC_LGUI,  KC_LALT,             KC_SPC,   KC_SPC,                 KC_SPC,             KC_RALT,     MO(1),   KC_MENU,                KC_RCTL,   KC_LEFT,  KC_DOWN,    KC_RGHT
+    ),
+
+    [1] = LAYOUT_all(
+        _______,             KC_F14,   KC_F15, G(KC_TAB),  KC_WSCH,  G(C(KC_S)),   KC_SLEP,   KC_MPRV,  KC_MPLY,   KC_MNXT,   KC_MUTE,  KC_VOLD,     KC_VOLU,    KC_PSCR,  KC_SCRL,   KC_PAUS,
+        _______,  _______,  _______,  _______,   _______,  _______,     _______,   _______,   _______,  _______,   BL_TOGG,   BL_BRTG,  BL_BRTG,      KC_DEL,     KC_INS,  KC_HOME,   KC_PGUP,
+        _______,  _______,  _______,  _______,   _______,  _______,     _______,   _______,   _______,  _______,   _______,   _______,  _______,     _______,     KC_DEL,   KC_END,   KC_PGDN,
+        _______,  _______,  _______,  _______,   _______,  _______,     _______,   _______,   _______,  _______,   _______,   _______,               _______,
+        _______,  _______,  _______,  _______,   _______,  _______,     _______,   _______,   _______,  _______,   _______,                          _______,                BL_UP,
+        _______,  _______,  _______,             _______,  _______,                _______,             _______,   _______,   _______,               _______,    KC_LEFT,  BL_DOWN,   KC_RGHT
+    )
+};
+
+#if defined(ENCODER_MAP_ENABLE)
+const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
+    [0] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU), ENCODER_CCW_CW(BL_DOWN, BL_UP), ENCODER_CCW_CW(C(MS_WHLD), C(MS_WHLU))},
+    [1] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU), ENCODER_CCW_CW(BL_DOWN, BL_UP), ENCODER_CCW_CW(C(MS_WHLD), C(MS_WHLU))}
+};
+#endif
diff --git a/keyboards/skyloong/gk87/bl/ansi/keymaps/default/rules.mk b/keyboards/skyloong/gk87/bl/ansi/keymaps/default/rules.mk
new file mode 100644
index 00000000000..ee325681483
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/ansi/keymaps/default/rules.mk
@@ -0,0 +1 @@
+ENCODER_MAP_ENABLE = yes
diff --git a/keyboards/skyloong/gk87/bl/ansi/rules.mk b/keyboards/skyloong/gk87/bl/ansi/rules.mk
new file mode 100644
index 00000000000..3bbd2614291
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/ansi/rules.mk
@@ -0,0 +1 @@
+# File intentionally blank
diff --git a/keyboards/skyloong/gk87/bl/bl.c b/keyboards/skyloong/gk87/bl/bl.c
new file mode 100644
index 00000000000..a2a5a4506e5
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/bl.c
@@ -0,0 +1,75 @@
+//  Copyright 2023 NaturalZh (@NaturalZh)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "quantum.h"
+
+bool backup_breath = 0; // Marked backlight breathing mode
+
+void suspend_power_down_kb() {
+    gpio_write_pin_high(MAC_PIN);
+    suspend_power_down_user();
+}
+
+void suspend_wakeup_init_kb() {
+    suspend_wakeup_init_user();
+}
+
+bool shutdown_kb(bool jump_to_bootloader) {
+    gpio_write_pin_high(MAC_PIN);
+    return shutdown_user(jump_to_bootloader);
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+    if (!process_record_user(keycode, record)) {
+        return false;
+    }
+    switch (keycode) {
+
+       case BL_TOGG:
+         if (record->event.pressed) {
+            if (is_backlight_breathing()){
+               backup_breath = 1;                //backup breathing before shut down backlight.
+               backlight_disable_breathing();
+            } else if (backup_breath){          //check backuped breathing before switching backlight
+                backlight_enable_breathing();
+                backup_breath = 0;
+              }
+           }
+        return true;
+
+      case BL_BRTG:
+         if (!is_backlight_breathing() && !is_backlight_enabled()){
+              return false;
+            }else{
+              return true;
+            }
+
+      case BL_UP:
+         if (backup_breath){                      //check backuped breathing before creasing brightness
+                backlight_enable_breathing();
+                backup_breath = 0;
+              }
+         return true;
+
+       case BL_DOWN:
+        if (!is_backlight_breathing() && !is_backlight_enabled()){
+              return false;
+            }else{
+              return true;
+            }
+
+      default:
+         return true;
+    }
+}
+
+layer_state_t default_layer_state_set_kb(layer_state_t state) {
+    gpio_write_pin(MAC_PIN, !layer_state_cmp(state, 1));
+  return default_layer_state_set_user(state);
+}
+
+void board_init(void) {
+    // JTAG-DP Disabled and SW-DP Disabled
+    AFIO->MAPR = (AFIO->MAPR & ~AFIO_MAPR_SWJ_CFG_Msk) | AFIO_MAPR_SWJ_CFG_DISABLE;
+    gpio_set_pin_output(MAC_PIN);
+    gpio_write_pin_high(MAC_PIN);
+}
diff --git a/keyboards/skyloong/gk87/bl/config.h b/keyboards/skyloong/gk87/bl/config.h
new file mode 100644
index 00000000000..40622b6fae5
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/config.h
@@ -0,0 +1,7 @@
+// Copyright 2023 JZ-Skyloong (@JZ-Skyloong)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#define MAC_PIN C13
+#define ENCODER_MAP_KEY_DELAY 20
diff --git a/keyboards/skyloong/gk87/bl/halconf.h b/keyboards/skyloong/gk87/bl/halconf.h
new file mode 100644
index 00000000000..67f677c5f9d
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/halconf.h
@@ -0,0 +1,5 @@
+// Copyright 2023 JZ-Skyloong (@JZ-Skyloong)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+#define HAL_USE_PWM TRUE
+#include_next <halconf.h>
diff --git a/keyboards/skyloong/gk87/bl/info.json b/keyboards/skyloong/gk87/bl/info.json
new file mode 100644
index 00000000000..7e6d2b9c187
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/info.json
@@ -0,0 +1,53 @@
+{
+    "manufacturer": "skyloong",
+    "maintainer": "NaturalZh",
+    "backlight": {
+        "breathing": true,
+        "breathing_period": 5,
+        "default": {
+            "breathing": false,
+            "brightness": 30
+        },
+        "driver": "pwm",
+        "levels": 20,
+        "on_state": 1,
+        "pin": "B8"
+    },
+    "debounce": 10,
+    "bootloader": "stm32duino",
+    "build": {
+        "debounce_type": "asym_eager_defer_pk"
+    },
+    "diode_direction": "ROW2COL",
+    "encoder": {
+        "rotary": [
+            {"pin_a": "A15", "pin_b": "B3", "resolution": 2},
+            {"pin_a": "B4", "pin_b": "B5", "resolution": 2},
+            {"pin_a": "B6", "pin_b": "B7", "resolution": 2}
+        ]
+    },
+    "features": {
+        "backlight": true,
+        "bootmagic": true,
+        "command": true,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true
+    },
+    "indicators": {
+        "caps_lock": "C15",
+        "on_state": 0,
+        "scroll_lock": "C14"
+    },
+    "matrix_pins": {
+        "cols": ["A0", "A1", "A2", "A3", "A4", "A5", "B0", "B1", "B10", "B11", "B12", "A7", "A6", "B9", "A14", "A13"],
+        "rows": ["A10", "A9", "A8", "B15", "B14", "B13"]
+    },
+    "processor": "STM32F103",
+    "url": "https://github.com/JZ-Skyloong",
+    "usb": {
+        "max_power": 380,
+        "vid": "0x1EA7"
+    }
+}
diff --git a/keyboards/skyloong/gk87/bl/iso/keyboard.json b/keyboards/skyloong/gk87/bl/iso/keyboard.json
new file mode 100644
index 00000000000..c91a576a214
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/iso/keyboard.json
@@ -0,0 +1,304 @@
+{
+    "keyboard_name": "GK87 Backlight_iso_1.0.0",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x6A88"
+    },
+    "community_layouts": ["tkl_iso"],
+    "layouts": {
+        "LAYOUT_all": {
+            "layout": [
+                {"label": "ESC", "matrix": [0, 0], "x": 0, "y": 0},
+                {"label": "F1", "matrix": [0, 2], "x": 2, "y": 0},
+                {"label": "F2", "matrix": [0, 3], "x": 3, "y": 0},
+                {"label": "F3", "matrix": [0, 4], "x": 4, "y": 0},
+                {"label": "F4", "matrix": [0, 5], "x": 5, "y": 0},
+                {"label": "F5", "matrix": [0, 6], "x": 6.5, "y": 0},
+                {"label": "F6", "matrix": [0, 7], "x": 7.5, "y": 0},
+                {"label": "F7", "matrix": [0, 8], "x": 8.5, "y": 0},
+                {"label": "F8", "matrix": [0, 9], "x": 9.5, "y": 0},
+                {"label": "F9", "matrix": [0, 10], "x": 11, "y": 0},
+                {"label": "F10", "matrix": [0, 11], "x": 12, "y": 0},
+                {"label": "F11", "matrix": [0, 12], "x": 13, "y": 0},
+                {"label": "F12", "matrix": [0, 13], "x": 14, "y": 0},
+                {"label": "PrtSc", "matrix": [0, 14], "x": 15.25, "y": 0},
+                {"label": "SL", "matrix": [0, 15], "x": 16.25, "y": 0},
+                {"label": "PB", "matrix": [3, 14], "x": 17.25, "y": 0},
+
+                {"label": "~", "matrix": [1, 0], "x": 0, "y": 1.25},
+                {"label": "1", "matrix": [1, 1], "x": 1, "y": 1.25},
+                {"label": "2", "matrix": [1, 2], "x": 2, "y": 1.25},
+                {"label": "3", "matrix": [1, 3], "x": 3, "y": 1.25},
+                {"label": "4", "matrix": [1, 4], "x": 4, "y": 1.25},
+                {"label": "5", "matrix": [1, 5], "x": 5, "y": 1.25},
+                {"label": "6", "matrix": [1, 6], "x": 6, "y": 1.25},
+                {"label": "7", "matrix": [1, 7], "x": 7, "y": 1.25},
+                {"label": "8", "matrix": [1, 8], "x": 8, "y": 1.25},
+                {"label": "9", "matrix": [1, 9], "x": 9, "y": 1.25},
+                {"label": "0", "matrix": [1, 10], "x": 10, "y": 1.25},
+                {"label": "-_", "matrix": [1, 11], "x": 11, "y": 1.25},
+                {"label": "=+", "matrix": [1, 12], "x": 12, "y": 1.25},
+                {"label": "BS", "matrix": [1, 13], "x": 13, "y": 1.25, "w": 2},
+                {"label": "Ins", "matrix": [1, 14], "x": 15.25, "y": 1.25},
+                {"label": "Home", "matrix": [1, 15], "x": 16.25, "y": 1.25},
+                {"label": "PgUp", "matrix": [3, 15], "x": 17.25, "y": 1.25},
+
+                {"label": "Tab", "matrix": [2, 0], "x": 0, "y": 2.25, "w": 1.5},
+                {"label": "Q", "matrix": [2, 1], "x": 1.5, "y": 2.25},
+                {"label": "W", "matrix": [2, 2], "x": 2.5, "y": 2.25},
+                {"label": "E", "matrix": [2, 3], "x": 3.5, "y": 2.25},
+                {"label": "R", "matrix": [2, 4], "x": 4.5, "y": 2.25},
+                {"label": "T", "matrix": [2, 5], "x": 5.5, "y": 2.25},
+                {"label": "Y", "matrix": [2, 6], "x": 6.5, "y": 2.25},
+                {"label": "U", "matrix": [2, 7], "x": 7.5, "y": 2.25},
+                {"label": "I", "matrix": [2, 8], "x": 8.5, "y": 2.25},
+                {"label": "O", "matrix": [2, 9], "x": 9.5, "y": 2.25},
+                {"label": "P", "matrix": [2, 10], "x": 10.5, "y": 2.25},
+                {"label": "[", "matrix": [2, 11], "x": 11.5, "y": 2.25},
+                {"label": "]", "matrix": [2, 12], "x": 12.5, "y": 2.25},
+                {"label": "Del", "matrix": [2, 14], "x": 15.25, "y": 2.25},
+                {"label": "End", "matrix": [2, 15], "x": 16.25, "y": 2.25},
+                {"label": "PgDn", "matrix": [4, 15], "x": 17.25, "y": 2.25},
+
+                {"label": "Cap", "matrix": [3, 0], "x": 0, "y": 3.25, "w": 1.75},
+                {"label": "A", "matrix": [3, 1], "x": 1.75, "y": 3.25},
+                {"label": "S", "matrix": [3, 2], "x": 2.75, "y": 3.25},
+                {"label": "D", "matrix": [3, 3], "x": 3.75, "y": 3.25},
+                {"label": "F", "matrix": [3, 4], "x": 4.75, "y": 3.25},
+                {"label": "G", "matrix": [3, 5], "x": 5.75, "y": 3.25},
+                {"label": "H", "matrix": [3, 6], "x": 6.75, "y": 3.25},
+                {"label": "J", "matrix": [3, 7], "x": 7.75, "y": 3.25},
+                {"label": "K", "matrix": [3, 8], "x": 8.75, "y": 3.25},
+                {"label": "L", "matrix": [3, 9], "x": 9.75, "y": 3.25},
+                {"label": ";", "matrix": [3, 10], "x": 10.75, "y": 3.25},
+                {"label": "'", "matrix": [3, 11], "x": 11.75, "y": 3.25},
+                {"label": "k49", "matrix": [3, 12], "x": 12.75, "y": 3.25},
+                {"label": "Ent", "matrix": [3, 13], "x": 13.75, "y": 2.25, "w": 1.25, "h":2},
+
+                {"label": "Shift", "matrix": [4, 0], "x": 0, "y": 4.25, "w": 1.25},
+                {"label": "k45", "matrix": [5, 3], "x": 1.25, "y": 4.25},
+                {"label": "Z", "matrix": [4, 1], "x": 2.25, "y": 4.25},
+                {"label": "X", "matrix": [4, 2], "x": 3.25, "y": 4.25},
+                {"label": "C", "matrix": [4, 3], "x": 4.25, "y": 4.25},
+                {"label": "V", "matrix": [4, 4], "x": 5.25, "y": 4.25},
+                {"label": "B", "matrix": [4, 5], "x": 6.25, "y": 4.25},
+                {"label": "N", "matrix": [4, 6], "x": 7.25, "y": 4.25},
+                {"label": "M", "matrix": [4, 7], "x": 8.25, "y": 4.25},
+                {"label": ",", "matrix": [4, 8], "x": 9.25, "y": 4.25},
+                {"label": ".", "matrix": [4, 9], "x": 10.25, "y": 4.25},
+                {"label": "?", "matrix": [4, 10], "x": 11.25, "y": 4.25},
+                {"label": "Shift", "matrix": [4, 12], "x": 12.25, "y": 4.25, "w": 2.75},
+                {"label": "Up", "matrix": [4, 14], "x": 16.25, "y": 4.25},
+
+                {"label": "Ctrl", "matrix": [5, 0], "x": 0, "y": 5.25, "w": 1.25},
+                {"label": "Com", "matrix": [5, 1], "x": 1.25, "y": 5.25, "w": 1.25},
+                {"label": "Alt", "matrix": [5, 2], "x": 2.5, "y": 5.25, "w": 1.25},
+                {"label": "SPAC1", "matrix": [5, 4], "x": 3.75, "y": 5.25, "w": 2.5},
+                {"label": "SPAC", "matrix": [5, 5], "x": 6.25, "y": 5.25, "w": 1.25},
+                {"label": "SPAC2", "matrix": [5, 7], "x": 7.5, "y": 5.25, "w": 2.5},
+                {"label": "Alt", "matrix": [5, 9], "x": 10, "y": 5.25, "w": 1.25},
+                {"label": "Menu", "matrix": [5, 10], "x": 11.25, "y": 5.25, "w": 1.25},
+                {"label": "Ctrl", "matrix": [5, 11], "x": 12.5, "y": 5.25, "w": 1.25},
+                {"label": "Fn", "matrix": [5, 12], "x": 13.75, "y": 5.25, "w": 1.25},
+                {"label": "Left", "matrix": [5, 13], "x": 15.25, "y": 5.25},
+                {"label": "Down", "matrix": [5, 14], "x": 16.25, "y": 5.25},
+                {"label": "Right", "matrix": [5, 15], "x": 17.25, "y": 5.25}
+            ]
+        },
+        "LAYOUT_tkl_iso": {
+            "layout": [
+                {"label": "ESC", "matrix": [0, 0], "x": 0, "y": 0},
+                {"label": "F1", "matrix": [0, 2], "x": 2, "y": 0},
+                {"label": "F2", "matrix": [0, 3], "x": 3, "y": 0},
+                {"label": "F3", "matrix": [0, 4], "x": 4, "y": 0},
+                {"label": "F4", "matrix": [0, 5], "x": 5, "y": 0},
+                {"label": "F5", "matrix": [0, 6], "x": 6.5, "y": 0},
+                {"label": "F6", "matrix": [0, 7], "x": 7.5, "y": 0},
+                {"label": "F7", "matrix": [0, 8], "x": 8.5, "y": 0},
+                {"label": "F8", "matrix": [0, 9], "x": 9.5, "y": 0},
+                {"label": "F9", "matrix": [0, 10], "x": 11, "y": 0},
+                {"label": "F10", "matrix": [0, 11], "x": 12, "y": 0},
+                {"label": "F11", "matrix": [0, 12], "x": 13, "y": 0},
+                {"label": "F12", "matrix": [0, 13], "x": 14, "y": 0},
+                {"label": "PrtSc", "matrix": [0, 14], "x": 15.25, "y": 0},
+                {"label": "SL", "matrix": [0, 15], "x": 16.25, "y": 0},
+                {"label": "PB", "matrix": [3, 14], "x": 17.25, "y": 0},
+
+                {"label": "~", "matrix": [1, 0], "x": 0, "y": 1.25},
+                {"label": "1", "matrix": [1, 1], "x": 1, "y": 1.25},
+                {"label": "2", "matrix": [1, 2], "x": 2, "y": 1.25},
+                {"label": "3", "matrix": [1, 3], "x": 3, "y": 1.25},
+                {"label": "4", "matrix": [1, 4], "x": 4, "y": 1.25},
+                {"label": "5", "matrix": [1, 5], "x": 5, "y": 1.25},
+                {"label": "6", "matrix": [1, 6], "x": 6, "y": 1.25},
+                {"label": "7", "matrix": [1, 7], "x": 7, "y": 1.25},
+                {"label": "8", "matrix": [1, 8], "x": 8, "y": 1.25},
+                {"label": "9", "matrix": [1, 9], "x": 9, "y": 1.25},
+                {"label": "0", "matrix": [1, 10], "x": 10, "y": 1.25},
+                {"label": "-_", "matrix": [1, 11], "x": 11, "y": 1.25},
+                {"label": "=+", "matrix": [1, 12], "x": 12, "y": 1.25},
+                {"label": "BS", "matrix": [1, 13], "x": 13, "y": 1.25, "w": 2},
+                {"label": "Ins", "matrix": [1, 14], "x": 15.25, "y": 1.25},
+                {"label": "Home", "matrix": [1, 15], "x": 16.25, "y": 1.25},
+                {"label": "PgUp", "matrix": [3, 15], "x": 17.25, "y": 1.25},
+
+                {"label": "Tab", "matrix": [2, 0], "x": 0, "y": 2.25, "w": 1.5},
+                {"label": "Q", "matrix": [2, 1], "x": 1.5, "y": 2.25},
+                {"label": "W", "matrix": [2, 2], "x": 2.5, "y": 2.25},
+                {"label": "E", "matrix": [2, 3], "x": 3.5, "y": 2.25},
+                {"label": "R", "matrix": [2, 4], "x": 4.5, "y": 2.25},
+                {"label": "T", "matrix": [2, 5], "x": 5.5, "y": 2.25},
+                {"label": "Y", "matrix": [2, 6], "x": 6.5, "y": 2.25},
+                {"label": "U", "matrix": [2, 7], "x": 7.5, "y": 2.25},
+                {"label": "I", "matrix": [2, 8], "x": 8.5, "y": 2.25},
+                {"label": "O", "matrix": [2, 9], "x": 9.5, "y": 2.25},
+                {"label": "P", "matrix": [2, 10], "x": 10.5, "y": 2.25},
+                {"label": "[", "matrix": [2, 11], "x": 11.5, "y": 2.25},
+                {"label": "]", "matrix": [2, 12], "x": 12.5, "y": 2.25},
+                {"label": "Del", "matrix": [2, 14], "x": 15.25, "y": 2.25},
+                {"label": "End", "matrix": [2, 15], "x": 16.25, "y": 2.25},
+                {"label": "PgDn", "matrix": [4, 15], "x": 17.25, "y": 2.25},
+
+                {"label": "Cap", "matrix": [3, 0], "x": 0, "y": 3.25, "w": 1.75},
+                {"label": "A", "matrix": [3, 1], "x": 1.75, "y": 3.25},
+                {"label": "S", "matrix": [3, 2], "x": 2.75, "y": 3.25},
+                {"label": "D", "matrix": [3, 3], "x": 3.75, "y": 3.25},
+                {"label": "F", "matrix": [3, 4], "x": 4.75, "y": 3.25},
+                {"label": "G", "matrix": [3, 5], "x": 5.75, "y": 3.25},
+                {"label": "H", "matrix": [3, 6], "x": 6.75, "y": 3.25},
+                {"label": "J", "matrix": [3, 7], "x": 7.75, "y": 3.25},
+                {"label": "K", "matrix": [3, 8], "x": 8.75, "y": 3.25},
+                {"label": "L", "matrix": [3, 9], "x": 9.75, "y": 3.25},
+                {"label": ";", "matrix": [3, 10], "x": 10.75, "y": 3.25},
+                {"label": "'", "matrix": [3, 11], "x": 11.75, "y": 3.25},
+                {"label": "k49", "matrix": [3, 12], "x": 12.75, "y": 3.25},
+                {"label": "Ent", "matrix": [3, 13], "x": 13.75, "y": 2.25, "w": 1.25, "h":2},
+
+                {"label": "Shift", "matrix": [4, 0], "x": 0, "y": 4.25, "w": 1.25},
+                {"label": "k45", "matrix": [5, 3], "x": 1.25, "y": 4.25},
+                {"label": "Z", "matrix": [4, 1], "x": 2.25, "y": 4.25},
+                {"label": "X", "matrix": [4, 2], "x": 3.25, "y": 4.25},
+                {"label": "C", "matrix": [4, 3], "x": 4.25, "y": 4.25},
+                {"label": "V", "matrix": [4, 4], "x": 5.25, "y": 4.25},
+                {"label": "B", "matrix": [4, 5], "x": 6.25, "y": 4.25},
+                {"label": "N", "matrix": [4, 6], "x": 7.25, "y": 4.25},
+                {"label": "M", "matrix": [4, 7], "x": 8.25, "y": 4.25},
+                {"label": ",", "matrix": [4, 8], "x": 9.25, "y": 4.25},
+                {"label": ".", "matrix": [4, 9], "x": 10.25, "y": 4.25},
+                {"label": "?", "matrix": [4, 10], "x": 11.25, "y": 4.25},
+                {"label": "Shift", "matrix": [4, 12], "x": 12.25, "y": 4.25, "w": 2.75},
+                {"label": "Up", "matrix": [4, 14], "x": 16.25, "y": 4.25},
+
+                {"label": "Ctrl", "matrix": [5, 0], "x": 0, "y": 5.25, "w": 1.25},
+                {"label": "Com", "matrix": [5, 1], "x": 1.25, "y": 5.25, "w": 1.25},
+                {"label": "Alt", "matrix": [5, 2], "x": 2.5, "y": 5.25, "w": 1.25},
+                {"label": "SPAC", "matrix": [5, 5], "x": 3.75, "y": 5.25, "w": 6.25},
+                {"label": "Alt", "matrix": [5, 9], "x": 10, "y": 5.25, "w": 1.25},
+                {"label": "Menu", "matrix": [5, 10], "x": 11.25, "y": 5.25, "w": 1.25},
+                {"label": "Ctrl", "matrix": [5, 11], "x": 12.5, "y": 5.25, "w": 1.25},
+                {"label": "Fn", "matrix": [5, 12], "x": 13.75, "y": 5.25, "w": 1.25},
+                {"label": "Left", "matrix": [5, 13], "x": 15.25, "y": 5.25},
+                {"label": "Down", "matrix": [5, 14], "x": 16.25, "y": 5.25},
+                {"label": "Right", "matrix": [5, 15], "x": 17.25, "y": 5.25}
+            ]
+        },
+        "LAYOUT_iso_split_space": {
+            "layout": [
+                {"label": "ESC", "matrix": [0, 0], "x": 0, "y": 0},
+                {"label": "F1", "matrix": [0, 2], "x": 2, "y": 0},
+                {"label": "F2", "matrix": [0, 3], "x": 3, "y": 0},
+                {"label": "F3", "matrix": [0, 4], "x": 4, "y": 0},
+                {"label": "F4", "matrix": [0, 5], "x": 5, "y": 0},
+                {"label": "F5", "matrix": [0, 6], "x": 6.5, "y": 0},
+                {"label": "F6", "matrix": [0, 7], "x": 7.5, "y": 0},
+                {"label": "F7", "matrix": [0, 8], "x": 8.5, "y": 0},
+                {"label": "F8", "matrix": [0, 9], "x": 9.5, "y": 0},
+                {"label": "F9", "matrix": [0, 10], "x": 11, "y": 0},
+                {"label": "F10", "matrix": [0, 11], "x": 12, "y": 0},
+                {"label": "F11", "matrix": [0, 12], "x": 13, "y": 0},
+                {"label": "F12", "matrix": [0, 13], "x": 14, "y": 0},
+                {"label": "PrtSc", "matrix": [0, 14], "x": 15.25, "y": 0},
+                {"label": "SL", "matrix": [0, 15], "x": 16.25, "y": 0},
+                {"label": "PB", "matrix": [3, 14], "x": 17.25, "y": 0},
+
+                {"label": "~", "matrix": [1, 0], "x": 0, "y": 1.25},
+                {"label": "1", "matrix": [1, 1], "x": 1, "y": 1.25},
+                {"label": "2", "matrix": [1, 2], "x": 2, "y": 1.25},
+                {"label": "3", "matrix": [1, 3], "x": 3, "y": 1.25},
+                {"label": "4", "matrix": [1, 4], "x": 4, "y": 1.25},
+                {"label": "5", "matrix": [1, 5], "x": 5, "y": 1.25},
+                {"label": "6", "matrix": [1, 6], "x": 6, "y": 1.25},
+                {"label": "7", "matrix": [1, 7], "x": 7, "y": 1.25},
+                {"label": "8", "matrix": [1, 8], "x": 8, "y": 1.25},
+                {"label": "9", "matrix": [1, 9], "x": 9, "y": 1.25},
+                {"label": "0", "matrix": [1, 10], "x": 10, "y": 1.25},
+                {"label": "-_", "matrix": [1, 11], "x": 11, "y": 1.25},
+                {"label": "=+", "matrix": [1, 12], "x": 12, "y": 1.25},
+                {"label": "BS", "matrix": [1, 13], "x": 13, "y": 1.25, "w": 2},
+                {"label": "Ins", "matrix": [1, 14], "x": 15.25, "y": 1.25},
+                {"label": "Home", "matrix": [1, 15], "x": 16.25, "y": 1.25},
+                {"label": "PgUp", "matrix": [3, 15], "x": 17.25, "y": 1.25},
+
+                {"label": "Tab", "matrix": [2, 0], "x": 0, "y": 2.25, "w": 1.5},
+                {"label": "Q", "matrix": [2, 1], "x": 1.5, "y": 2.25},
+                {"label": "W", "matrix": [2, 2], "x": 2.5, "y": 2.25},
+                {"label": "E", "matrix": [2, 3], "x": 3.5, "y": 2.25},
+                {"label": "R", "matrix": [2, 4], "x": 4.5, "y": 2.25},
+                {"label": "T", "matrix": [2, 5], "x": 5.5, "y": 2.25},
+                {"label": "Y", "matrix": [2, 6], "x": 6.5, "y": 2.25},
+                {"label": "U", "matrix": [2, 7], "x": 7.5, "y": 2.25},
+                {"label": "I", "matrix": [2, 8], "x": 8.5, "y": 2.25},
+                {"label": "O", "matrix": [2, 9], "x": 9.5, "y": 2.25},
+                {"label": "P", "matrix": [2, 10], "x": 10.5, "y": 2.25},
+                {"label": "[", "matrix": [2, 11], "x": 11.5, "y": 2.25},
+                {"label": "]", "matrix": [2, 12], "x": 12.5, "y": 2.25},
+                {"label": "Del", "matrix": [2, 14], "x": 15.25, "y": 2.25},
+                {"label": "End", "matrix": [2, 15], "x": 16.25, "y": 2.25},
+                {"label": "PgDn", "matrix": [4, 15], "x": 17.25, "y": 2.25},
+
+                {"label": "Cap", "matrix": [3, 0], "x": 0, "y": 3.25, "w": 1.75},
+                {"label": "A", "matrix": [3, 1], "x": 1.75, "y": 3.25},
+                {"label": "S", "matrix": [3, 2], "x": 2.75, "y": 3.25},
+                {"label": "D", "matrix": [3, 3], "x": 3.75, "y": 3.25},
+                {"label": "F", "matrix": [3, 4], "x": 4.75, "y": 3.25},
+                {"label": "G", "matrix": [3, 5], "x": 5.75, "y": 3.25},
+                {"label": "H", "matrix": [3, 6], "x": 6.75, "y": 3.25},
+                {"label": "J", "matrix": [3, 7], "x": 7.75, "y": 3.25},
+                {"label": "K", "matrix": [3, 8], "x": 8.75, "y": 3.25},
+                {"label": "L", "matrix": [3, 9], "x": 9.75, "y": 3.25},
+                {"label": ";", "matrix": [3, 10], "x": 10.75, "y": 3.25},
+                {"label": "'", "matrix": [3, 11], "x": 11.75, "y": 3.25},
+                {"label": "k49", "matrix": [3, 12], "x": 12.75, "y": 3.25},
+                {"label": "Ent", "matrix": [3, 13], "x": 13.75, "y": 2.25, "w": 1.25, "h":2},
+
+                {"label": "Shift", "matrix": [4, 0], "x": 0, "y": 4.25, "w": 1.25},
+                {"label": "k45", "matrix": [5, 3], "x": 1.25, "y": 4.25},
+                {"label": "Z", "matrix": [4, 1], "x": 2.25, "y": 4.25},
+                {"label": "X", "matrix": [4, 2], "x": 3.25, "y": 4.25},
+                {"label": "C", "matrix": [4, 3], "x": 4.25, "y": 4.25},
+                {"label": "V", "matrix": [4, 4], "x": 5.25, "y": 4.25},
+                {"label": "B", "matrix": [4, 5], "x": 6.25, "y": 4.25},
+                {"label": "N", "matrix": [4, 6], "x": 7.25, "y": 4.25},
+                {"label": "M", "matrix": [4, 7], "x": 8.25, "y": 4.25},
+                {"label": ",", "matrix": [4, 8], "x": 9.25, "y": 4.25},
+                {"label": ".", "matrix": [4, 9], "x": 10.25, "y": 4.25},
+                {"label": "?", "matrix": [4, 10], "x": 11.25, "y": 4.25},
+                {"label": "Shift", "matrix": [4, 12], "x": 12.25, "y": 4.25, "w": 2.75},
+                {"label": "Up", "matrix": [4, 14], "x": 16.25, "y": 4.25},
+
+                {"label": "Ctrl", "matrix": [5, 0], "x": 0, "y": 5.25, "w": 1.25},
+                {"label": "Com", "matrix": [5, 1], "x": 1.25, "y": 5.25, "w": 1.25},
+                {"label": "Alt", "matrix": [5, 2], "x": 2.5, "y": 5.25, "w": 1.25},
+                {"label": "SPAC1", "matrix": [5, 4], "x": 3.75, "y": 5.25, "w": 3.25},
+                {"label": "SPAC2", "matrix": [5, 7], "x": 7, "y": 5.25, "w": 3},
+                {"label": "Alt", "matrix": [5, 9], "x": 10, "y": 5.25, "w": 1.25},
+                {"label": "Menu", "matrix": [5, 10], "x": 11.25, "y": 5.25, "w": 1.25},
+                {"label": "Ctrl", "matrix": [5, 11], "x": 12.5, "y": 5.25, "w": 1.25},
+                {"label": "Fn", "matrix": [5, 12], "x": 13.75, "y": 5.25, "w": 1.25},
+                {"label": "Left", "matrix": [5, 13], "x": 15.25, "y": 5.25},
+                {"label": "Down", "matrix": [5, 14], "x": 16.25, "y": 5.25},
+                {"label": "Right", "matrix": [5, 15], "x": 17.25, "y": 5.25}
+            ]
+        }
+    }
+}
diff --git a/keyboards/skyloong/gk87/bl/iso/keymaps/default/keymap.c b/keyboards/skyloong/gk87/bl/iso/keymaps/default/keymap.c
new file mode 100644
index 00000000000..a6f4b117e70
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/iso/keymaps/default/keymap.c
@@ -0,0 +1,33 @@
+// Copyright 2023 JZ-Skyloong (@JZ-Skyloong)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+    [0] = LAYOUT_all(
+         KC_ESC,              KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,   KC_F10,   KC_F11,   KC_F12,    KC_MUTE,   BL_TOGG, LSG(KC_S),
+         KC_GRV,     KC_1,     KC_2,     KC_3,     KC_4,     KC_5,     KC_6,     KC_7,     KC_8,     KC_9,     KC_0,  KC_MINS,   KC_EQL,  KC_BSPC,      KC_INS,  KC_HOME,   KC_PGUP,
+         KC_TAB,     KC_Q,     KC_W,     KC_E,     KC_R,     KC_T,     KC_Y,     KC_U,     KC_I,     KC_O,     KC_P,  KC_LBRC,  KC_RBRC,                KC_DEL,   KC_END,   KC_PGDN,
+        KC_CAPS,     KC_A,     KC_S,     KC_D,     KC_F,     KC_G,     KC_H,     KC_J,     KC_K,     KC_L,  KC_SCLN,  KC_QUOT,  KC_NUHS,   KC_ENT,
+        KC_LSFT,  KC_NUBS,     KC_Z,     KC_X,     KC_C,     KC_V,     KC_B,     KC_N,     KC_M,  KC_COMM,   KC_DOT,  KC_SLSH,            KC_RSFT,                 KC_UP,
+        KC_LCTL,  KC_LGUI,  KC_LALT,                       KC_SPC,   KC_SPC,   KC_SPC,                      KC_RALT,    MO(1),   KC_APP,  KC_RCTL,     KC_LEFT,  KC_DOWN,  KC_RGHT
+    ),
+
+    [1] = LAYOUT_all(
+        _______,             KC_F14,   KC_F15,  G(KC_TAB),  KC_WSCH,  G(C(KC_S)),    KC_SLEP,  KC_MPRV,  KC_MPLY,  KC_MNXT,   KC_MUTE,  KC_VOLD,  KC_VOLU,     KC_PSCR,  KC_SCRL,  KC_PAUS,
+        _______,  _______,  _______,  _______,    _______,  _______,     _______,    _______,  _______,  _______,  BL_TOGG,   BL_BRTG,  BL_BRTG,   KC_DEL,      KC_INS,  KC_HOME,  KC_PGUP,
+        _______,  _______,  _______,  _______,    _______,  _______,     _______,    _______,  _______,  _______,  _______,   _______,  _______,                KC_DEL,   KC_END,  KC_PGDN,
+        _______,  _______,  _______,  _______,    _______,  _______,     _______,    _______,  _______,  _______,  _______,   _______,  _______,  _______,
+        _______,  _______,  _______,  _______,    _______,  _______,     _______,    _______,  _______,  _______,  _______,   _______,            _______,                 BL_UP,
+        _______,  _______,  _______,                        _______,     _______,    _______,                      _______,   _______,  _______,  _______,     KC_LEFT,  BL_DOWN,   KC_RGHT
+    )
+};
+
+#if defined(ENCODER_MAP_ENABLE)
+const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
+    [0] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU), ENCODER_CCW_CW(BL_DOWN, BL_UP), ENCODER_CCW_CW(C(MS_WHLD), C(MS_WHLU))},
+    [1] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU), ENCODER_CCW_CW(BL_DOWN, BL_UP), ENCODER_CCW_CW(C(MS_WHLD), C(MS_WHLU))}
+};
+#endif
+
diff --git a/keyboards/skyloong/gk87/bl/iso/keymaps/default/rules.mk b/keyboards/skyloong/gk87/bl/iso/keymaps/default/rules.mk
new file mode 100644
index 00000000000..ee325681483
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/iso/keymaps/default/rules.mk
@@ -0,0 +1 @@
+ENCODER_MAP_ENABLE = yes
diff --git a/keyboards/skyloong/gk87/bl/iso/rules.mk b/keyboards/skyloong/gk87/bl/iso/rules.mk
new file mode 100644
index 00000000000..3bbd2614291
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/iso/rules.mk
@@ -0,0 +1 @@
+# File intentionally blank
diff --git a/keyboards/skyloong/gk87/bl/mcuconf.h b/keyboards/skyloong/gk87/bl/mcuconf.h
new file mode 100644
index 00000000000..d5a0f2ca135
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/mcuconf.h
@@ -0,0 +1,10 @@
+// Copyright 2023 JZ-Skyloong (@JZ-Skyloong)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#include_next <mcuconf.h>
+
+#undef STM32_PWM_USE_TIM4
+#define STM32_PWM_USE_TIM4 TRUE
+
+
diff --git a/keyboards/skyloong/gk87/bl/readme.md b/keyboards/skyloong/gk87/bl/readme.md
new file mode 100644
index 00000000000..d857999ea29
--- /dev/null
+++ b/keyboards/skyloong/gk87/bl/readme.md
@@ -0,0 +1,33 @@
+# GK87 Backlight Keyboard
+
+![GK87 BL ANSI](https://i.imgur.com/pWJwQKG.jpg)
+
+## The PCB features:
+* QMK & VIA compatibility
+* LED backlight
+
+The following is the QMK Firmware for the Destop 87% keylayout -  designed by Dongguan Jizhi Electronic Technology Co., Ltd
+
+* Keyboard Maintainer: [NaturalZh](https://github.com/NaturalZh)
+* Hardware Supported: DestopPCB for Skyloong keylayout 85%, STM32F103C8T6
+* Hardware Availability: https://skyloongtech.com https://epomaker.com/
+
+Make example for this keyboard (after setting up your build environment):
+
+    make skyloong/gk87/bl/ansi:default
+    make skyloong/gk87/bl/iso:default
+
+Flashing example for this keyboard:
+
+    make skyloong/gk87/bl/ansi:default:flash
+    make skyloong/gk87/bl/iso:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: Briefly press the button on the back of the PCB - some may have pads you must short instead
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available