Yo uso esto para mis menus de configuración de teclas tal vez te sirva
lo dibujarias en panatalla de esta forma ejemplo
if(keyboard_check(left)==true){draw_text_colour(144, 25,+string(scr_keyname(left)),c_red,c_yellow,c_orange,c_red,1)}
[gml]
///scr_keyname(key_check or pressed)
switch(argument0){
case 8: return "Backspace"; break;
case 9: return "Tab"; break;
case 12: return "Numpad Middle"; break;
case 13: return "Enter"; break;
case 16: return "Shift"; break;
case 17: return "Control"; break;
case 18: return "Alt"; break;
case 19: return "Pause"; break;
case 20: return "Caps Lock"; break;
case 27: return "Escape"; break;
case 32: return "Space"; break;
case 33: return "Page Up"; break;
case 34: return "Page Down"; break;
case 35: return "End"; break;
case 36: return "Home"; break;
case 37: return "Left"; break;
case 38: return "Up"; break;
case 39: return "Right"; break;
case 40: return "Down"; break;
case 44: return "Print Screen"; break;
case 45: return "Insert"; break;
case 46: return "Delete"; break;
case 48: return "0"; break;
case 49: return "1"; break;
case 50: return "2"; break;
case 51: return "3"; break;
case 52: return "4"; break;
case 53: return "5"; break;
case 54: return "6"; break;
case 55: return "7"; break;
case 56: return "8"; break;
case 57: return "9"; break;
case 65: return "A"; break;
case 66: return "B"; break;
case 67: return "C"; break;
case 68: return "D"; break;
case 69: return "E"; break;
case 70: return "F"; break;
case 71: return "G"; break;
case 72: return "H"; break;
case 73: return "I"; break;
case 74: return "J"; break;
case 75: return "K"; break;
case 76: return "L"; break;
case 77: return "M"; break;
case 78: return "N"; break;
case 79: return "O"; break;
case 80: return "P"; break;
case 81: return "Q"; break;
case 82: return "R"; break;
case 83: return "S"; break;
case 84: return "T"; break;
case 85: return "U"; break;
case 86: return "V"; break;
case 87: return "W"; break;
case 88: return "X"; break;
case 89: return "Y"; break;
case 90: return "Z"; break;
case 91: return "Left Windows"; break;
case 92: return "Right Windows"; break;
case 93: return "Menu Key"; break;
case 96: return "Numpad 0"; break;
case 97: return "Numpad 1"; break;
case 98: return "Numpad 2"; break;
case 99: return "Numpad 3"; break;
case 100: return "Numpad 4"; break;
case 101: return "Numpad 5"; break;
case 102: return "Numpad 6"; break;
case 103: return "Numpad 7"; break;
case 104: return "Numpad 8"; break;
case 105: return "Numpad 9"; break;
case 106: return "Numpad *"; break;
case 107: return "Numpad +"; break;
case 109: return "Numpad -"; break;
case 110: return "Numpad ."; break;
case 111: return "Numpad /"; break;
case 112: return "F1"; break;
case 113: return "F2"; break;
case 114: return "F3"; break;
case 115: return "F4"; break;
case 116: return "F5"; break;
case 117: return "F6"; break;
case 118: return "F7"; break;
case 119: return "F8"; break;
case 120: return "F9"; break;
case 121: return "F10"; break;
case 122: return "F11"; break;
case 123: return "F12"; break;
case 144: return "Num Lock"; break;
case 145: return "Scroll Lock"; break;
case 186: return ";"; break;
case 187: return "="; break;
case 189: return "-"; break;
case 192: return "`"; break;
case 188: return ","; break;
case 190: return "."; break;
case 191: return "é"; break;
case 219: return "^"; break;
case 220: return "<"; break;
case 221: return "¸"; break;
case 222: return "#"; break;
case 226: return "«"; break;
default: return string(argument0);}
[/gml]
lo dibujarias en panatalla de esta forma ejemplo
if(keyboard_check(left)==true){draw_text_colour(144, 25,+string(scr_keyname(left)),c_red,c_yellow,c_orange,c_red,1)}
[gml]
///scr_keyname(key_check or pressed)
switch(argument0){
case 8: return "Backspace"; break;
case 9: return "Tab"; break;
case 12: return "Numpad Middle"; break;
case 13: return "Enter"; break;
case 16: return "Shift"; break;
case 17: return "Control"; break;
case 18: return "Alt"; break;
case 19: return "Pause"; break;
case 20: return "Caps Lock"; break;
case 27: return "Escape"; break;
case 32: return "Space"; break;
case 33: return "Page Up"; break;
case 34: return "Page Down"; break;
case 35: return "End"; break;
case 36: return "Home"; break;
case 37: return "Left"; break;
case 38: return "Up"; break;
case 39: return "Right"; break;
case 40: return "Down"; break;
case 44: return "Print Screen"; break;
case 45: return "Insert"; break;
case 46: return "Delete"; break;
case 48: return "0"; break;
case 49: return "1"; break;
case 50: return "2"; break;
case 51: return "3"; break;
case 52: return "4"; break;
case 53: return "5"; break;
case 54: return "6"; break;
case 55: return "7"; break;
case 56: return "8"; break;
case 57: return "9"; break;
case 65: return "A"; break;
case 66: return "B"; break;
case 67: return "C"; break;
case 68: return "D"; break;
case 69: return "E"; break;
case 70: return "F"; break;
case 71: return "G"; break;
case 72: return "H"; break;
case 73: return "I"; break;
case 74: return "J"; break;
case 75: return "K"; break;
case 76: return "L"; break;
case 77: return "M"; break;
case 78: return "N"; break;
case 79: return "O"; break;
case 80: return "P"; break;
case 81: return "Q"; break;
case 82: return "R"; break;
case 83: return "S"; break;
case 84: return "T"; break;
case 85: return "U"; break;
case 86: return "V"; break;
case 87: return "W"; break;
case 88: return "X"; break;
case 89: return "Y"; break;
case 90: return "Z"; break;
case 91: return "Left Windows"; break;
case 92: return "Right Windows"; break;
case 93: return "Menu Key"; break;
case 96: return "Numpad 0"; break;
case 97: return "Numpad 1"; break;
case 98: return "Numpad 2"; break;
case 99: return "Numpad 3"; break;
case 100: return "Numpad 4"; break;
case 101: return "Numpad 5"; break;
case 102: return "Numpad 6"; break;
case 103: return "Numpad 7"; break;
case 104: return "Numpad 8"; break;
case 105: return "Numpad 9"; break;
case 106: return "Numpad *"; break;
case 107: return "Numpad +"; break;
case 109: return "Numpad -"; break;
case 110: return "Numpad ."; break;
case 111: return "Numpad /"; break;
case 112: return "F1"; break;
case 113: return "F2"; break;
case 114: return "F3"; break;
case 115: return "F4"; break;
case 116: return "F5"; break;
case 117: return "F6"; break;
case 118: return "F7"; break;
case 119: return "F8"; break;
case 120: return "F9"; break;
case 121: return "F10"; break;
case 122: return "F11"; break;
case 123: return "F12"; break;
case 144: return "Num Lock"; break;
case 145: return "Scroll Lock"; break;
case 186: return ";"; break;
case 187: return "="; break;
case 189: return "-"; break;
case 192: return "`"; break;
case 188: return ","; break;
case 190: return "."; break;
case 191: return "é"; break;
case 219: return "^"; break;
case 220: return "<"; break;
case 221: return "¸"; break;
case 222: return "#"; break;
case 226: return "«"; break;
default: return string(argument0);}
[/gml]