Just something I threw together quickly to make sure some members had their gamemodes reset to survival on next login since I can't seem to find a way built into essentials or any other plugin for that matter.
Commands (Aliases: /resetgm & /gmreset):
/resetgamemode add <uuid> - Set a player to be reset upon next login.
/resetgamemode remove <uuid> - Remove a player from being reset.
/resetgamemode list - Lists everyone set to be reset.
Permissions:
gamemodereseter.use - Ability to use all the above commands.