qmk_firmware/keyboards/gkeyboard/gkb_m16/info.json

{
    "keyboard_name": "gkb_m16",
    "url": "",
    "maintainer": "gkeyboard",
    "width": 4,
    "height": 4,
    "layouts": {
        "LAYOUT_ortho_4x4": {
            "layout": [
              {"x":0, "y":0},
              {"x":1, "y":0},
              {"x":2, "y":0},
              {"x":3, "y":0},
              {"x":0, "y":1},
              {"x":1, "y":1},
              {"x":2, "y":1},
              {"x":3, "y":1},
              {"x":0, "y":2},
              {"x":1, "y":2},
              {"x":2, "y":2},
              {"x":3, "y":2},
              {"x":0, "y":3},
              {"x":1, "y":3},
              {"x":2, "y":3},
              {"x":3, "y":3}
            ]
          }
        }
      }