Hello :D

command /gamemode [<text>] [<player>]:
    description: Changes the executor's gamemode.
    usage: /gamemode [<text>] [<player>]
    permission: prison.gamemode
    permission message: &7You are not allowed to &cchange gamemodes!
    executable by: players
    aliases: /gm, /egamemode, /egm
    trigger:
        if arg 1 is not set:
            message "&c&lVOID &8&l» &7Correct usage: &c/gamemode <gamemode> <player>"

        if arg 1 is "0" or "survival":
            if arg 2 is not set:
                set gamemode of player to Survival
                send "&c&lVOID &8&l» &7Your gamemode has been set to &csurvival mode."
            else:
                set gamemode of arg 2 to Survival
                send "&c&lVOID &8&l» &&7Your gamemode has been set to &csurvival mode &7by &f%player%." to arg 2
                send "&c&lVOID &8&l» &7You set &f%arg-2%'s &cgamemode &7to &csurvival mode."

        if arg 1 is "1" or "creative":
            if arg 2 is not set:
                set gamemode of player to Creative
                send "&c&lVOID &8&l» &7Your gamemode has been set to &ccreative mode."
            else:
                set gamemode of arg 2 to Creative
                send "&c&lVOID &8&l»  &7Your gamemode has been set to &acreative mode &7by &f%player%." to arg 2
                send "&c&lVOID &8&l»  &7Set &f%arg-2%'s &cgamemode &7to &ccreative mode."

        if arg 1 is "2" or "adventure":
            if arg 2 is not set:
                set gamemode of player to Adventure
                send "&c&lVOID &8&l» &7Your gamemode has been set to &cadventure mode."
            else:
                set gamemode of arg 2 to Adventure
                send "&&c&lVOID &8&l» &7Your gamemode has been set to &cadventure mode &7by &f%player%." to arg 2
                send "&c&lVOID &8&l» &7You set &f%arg-2%'s &cgamemode &7to &cadventure mode."

        if arg 1 is "3" or "spectator":
            if arg 2 is not set:
                set gamemode of player to Spectator
                send "&c&lVOID &8&l» &7Your gamemode has been set to &cspectator mode."
            else:
                send "&c&lVOID &8&l» &7Use /gamemode <gamemode>"