This mod adds commands for Minecraft to simplify changing gamemodes:
/gmc : sets gamemode to creative
/gms : sets gamemode to survival
/gma : sets gamemode to adventure
/gmsp : sets gamemode to spectator
(you can add selectors to commands)
Supported versions : Forge 1.20.1, 1.16.5; NeoForge 1.21.1, 1.21.4, 1.21.8; Fabric 1.20.1; Spigot 1.21.8