Commands:
/gm: Opens Gamemode GUI
/gm i: Gives you a physical menu item
/gm 0: Changes gamemmode to Survival
/gm 1: Changes gamemmode to Creative
/gm 2: Changes gamemmode to Adventure
/gm 3: Changes gamemmode to Spectator
/gm info: Shows plugin info and extras
/gm reload: Reloads the config file

Permission:
- sg.admin - grants players the ability to use the GUI as an admin