command /gm <number>:
( tab ) permission: skript.admin
( tab ) trigger:
( tab ) ( tab ) if arg 1 is "0":
( tab ) ( tab ) ( tab ) set player's gamemode to survival
( tab ) ( tab ) if arg 1 is "1":
( tab ) ( tab ) ( tab ) set player's gamemode to creative
( tab ) ( tab ) if arg 1 is "2":
( tab ) ( tab ) ( tab ) set player's gamemode to adventure