diff --git a/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/config.h b/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/config.h
new file mode 100644
index 0000000000..aee1ba39d5
--- /dev/null
+++ b/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/config.h
@@ -0,0 +1,24 @@
+/* Copyright 2021 Andrew Charnley
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#pragma once
+
+#define RGBLIGHT_DEFAULT_MODE RGBLIGHT_MODE_STATIC_LIGHT
+#define RGBLIGHT_DEFAULT_SAT 0
+#define RGB_DISABLE_WHEN_USB_SUSPENDED
+#define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_SOLID_COLOR
+
+
diff --git a/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/keymap.c b/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/keymap.c
new file mode 100644
index 0000000000..d044008a23
--- /dev/null
+++ b/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/keymap.c
@@ -0,0 +1,87 @@
+/* Copyright 2021 Andrew Charnley
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include QMK_KEYBOARD_H
+
+// Windows key changed to second FN key. Use KC_LGUI to revert.
+
+enum userspace_layers {
+ QWERTY,
+ FNLAYER
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+ // The FN key by default maps to a momentary toggle to layer 1 to provide access to the RESET key (to put the board into bootloader mode). Without
+ // this mapping, you have to open the case to hit the button on the bottom of the PCB (near the USB cable attachment) while plugging in the USB
+ // cable to get the board into bootloader mode - definitely not fun when you're working on your QMK builds. Remove this and put it back to KC_RGUI
+ // if that's your preference.
+ //
+ // To put the keyboard in bootloader mode, use FN+backslash. If you accidentally put it into bootloader, you can just unplug the USB cable and
+ // it'll be back to normal when you plug it back in.
+
+ [QWERTY] = LAYOUT(
+ 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_PSCR, KC_MUTE,
+ 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_DEL,
+ 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_PGUP,
+ 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_PGDN,
+ 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_END,
+ KC_LCTL, MO(FNLAYER), KC_LALT, KC_SPC, KC_RALT, MO(FNLAYER),KC_RCTL, KC_LEFT, KC_DOWN, KC_RGHT
+ ),
+
+ [FNLAYER] = LAYOUT(
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_MEDIA_PLAY_PAUSE,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, RESET , _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, RGB_VAI, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, RGB_VAD, _______
+ ),
+};
+
+bool encoder_update_user(uint8_t index, bool clockwise) {
+ if(IS_LAYER_ON(FNLAYER)) {
+ if (clockwise) {
+ tap_code(KC_MEDIA_NEXT_TRACK);
+ } else {
+ tap_code(KC_MEDIA_PREV_TRACK);
+ }
+ } else {
+ if (clockwise) {
+ tap_code(KC_VOLU);
+ } else {
+ tap_code(KC_VOLD);
+ }
+ }
+ return false;
+}
+
+static uint8_t val;
+
+void keyboard_post_init_user(void) {
+
+ val = rgb_matrix_get_val();
+}
+
+void rgb_matrix_indicators_advanced_user(uint8_t led_min, uint8_t led_max) {
+
+ if (host_keyboard_led_state().caps_lock) {
+ rgb_matrix_set_color_all(val,0,0);
+ } else {
+ rgb_matrix_set_color_all(val, val, val);
+ val = rgb_matrix_get_val();
+ }
+}
diff --git a/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/readme.md b/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/readme.md
new file mode 100644
index 0000000000..e064edd83a
--- /dev/null
+++ b/keyboards/gmmk/pro/ansi/keymaps/andrewcharnley/readme.md
@@ -0,0 +1,18 @@
+# Description
+A keymap designed to be functional for development purposes - no flashing lights or gimmicks. PRTSC and DEL key in the top right corner.
+Solid backlight that changes red if CAPS is on and reverts back afterwards. Brightness retained in both cases.
+Backlight is disabled on suspend and restored upon wake-up.
+The 'Windows' key is a second FN key. This makes it more natural to use the encoder wheel (good luck trying to do it with one hand).
+
+Compile using `qmk compile -kb gmmk/pro/ansi -km andrewcharnley`
+
+# Encoder
+FN + Encoder scroll = media next/prev
+FN + Encoder press = media pause
+default encoder behavior = volume up/down
+
+# Function Layer
+FN + Up = increase brightness
+FN + Down = decrease brightness
+FN + Backslash = bootloader
+