In order to move this guild, you would need another character on that server to replace you as GM while you AND that guild move to a new server.
If you attempt to create a new character to be GM, I think it needs to be in the guild for a certain number of days before it can be eligible for this.
Good God, let us make THIS clear:
THAT DOES NOT MATTER.
If you want to transfer ANY guild you need a Guild Transfer.
Doesn’t matter if it is a single character guild or 1000 players.
The guild itself and the current GM (you) would transfer.
HOWEVER, in order for this to occur you NEED to pass the GM position to another toon so there MUST be a second character in the guild before you transfer.
Edit: The GM transfer will happen in the transfer window. It will ask you which character you want to pass GM to after your current GM character leaves the server.
You will then have a “copy” of that guild left behind on the previous server.