options:
  m1 : "&4You don't have permission to perform this command!"
  m2 : "&4Correct usage: /gm [<player>] [<gamemode>]"
  p1 : "skript.gm"
  msv1 : "&cSuccesfully changed &byour &cgamemode to survival"
  mc1 : "&cSuccesfully changed &byour &cgamemode to creative"
  ma1 : "&cSucessfully changed &byour &cgamemode to adventure"
  ms1 : "&cSucessfully changed &byour &cgamemode to spectator"
  msv2 : "&cSuccesfully changed gamemode of &b%arg 2%&c to survival"
  mc2 : "&cSuccesfully changed gamemode of &b%arg 2%&c to creative"
  ma2 : "&cSuccesfully changed gamemode of &b%arg 2%&c to adventure"
  ms2 : "&cSuccesfully changed gamemode of &b%arg 2%&c to spectator"

on command:
  if command is "gamemode":
    cancel event
    execute player command "gm %arguments%"

command /gm [<text>] [<offlineplayer>]:
  trigger:
    if player has permission {@p1}:
      if arg 2 is set:
        if arg 1 is set:
          arg 1 is "0" or "survival":
            set arg 2's gamemode to survival
            send {@msv2}
          arg 1 is "1" or "creative":
            set arg 2's gamemode to creative
            send {@mc2}
          arg 1 is "2" or "adventure":
            set arg 2's gamemode to adventure
            send {@ma2}
          arg 1 is "3" or "spectator":
            set arg 2's gamemode to spectator
            send {@ms2}
        else:
          send {m2}
      else:
        arg 1 is "0" or "survival":
          set player's gamemode to survival
          send {@msv1}
        arg 1 is "1" or "creative":
          set player's gamemode to creative
          send {@mc1}
        arg 1 is "2" or "adventure":
          set player's gamemode to adventure
          send {@ma1}
        arg 1 is "3" or "spectator":
          set player's gamemode to spectator
          send {@ms1}
    else:
      send {@m1}