And no it is not a lot of work to be a GM even more so when u got Officers helping.
Lots of Gm's make it more work then what it really is.
Also to add yes i have been the GM of many guilds and there not around now cause i left those mmo's. the last one's i ran a guild in was GW2 and Wow.
A gm can leave the game just incase you didn't know.