qmk_firmware/keyboards/gh60/revc/keymaps/default/keymap.c

#include QMK_KEYBOARD_H

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {

    [0] = LAYOUT_all( /* 0: qwerty */
        KC_ESC,  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_BSLS, KC_GRV,
        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_BSPC,
        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_NO,   KC_ENT,
        KC_LSFT, TG(2),   KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT, MO(1),
        KC_LCTL, KC_LGUI, KC_LALT,                   KC_SPC,                                      KC_RALT, KC_RGUI, KC_APP,  KC_RCTL
    ),

    [1] = LAYOUT_all( /* 1: fn */
        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_UP,   _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, KC_LEFT, KC_DOWN, KC_RGHT, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______,                   _______,                                     _______, _______, _______, _______
    ),

    [2] = LAYOUT_all( /* 2: arrows */
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
        _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_UP,   _______,
        _______, _______, _______,                   _______,                                     _______, KC_LEFT, KC_DOWN, KC_RGHT
    ),

};

void matrix_scan_user(void) {

//Layer LED indicators
    layer_state_t layer = layer_state;

    if (layer & (1<<1)) {
        gh60_wasd_leds_on();
        gh60_fn_led_on();
    } else {
        gh60_wasd_leds_off();
        gh60_fn_led_off();
    }

    if (layer & (1<<2)) {
        gh60_poker_leds_on();
        gh60_esc_led_on();
    } else {
        gh60_poker_leds_off();
        gh60_esc_led_off();
    }

};