Feature request

Feature description
Add "ghost" as an alias for the "spectator" gamemode. (for example)
Add /gmg as an alias for /gmsp
My logic here is that "gmg" stands for "gamemode ghost" because spectator makes the player appear/act similar to a ghost

How the feature is useful
Makes the spectator gamemode command the same length as all the other gamemode commands, and can make it easier to memorize.

Add the alias yourself in commands.yml. There is no reason to add user aliases directly to Essentials.