/guildremove
 

It seems as though /guildremove while targeted on yourself does not work with officer status. Tried both targeting self and typing name. It says you can only remove players with lower status.

/sigh

Fixed, pending update.

In the meantime, you can petition ingame and a guide can remove you from your guild.

just ask your leader to remove you
unless your sneakin out in the middle of the night, like alot of people do when rent is due