To create a Guild on a server, press "G" on the keyboard. This will bring up a window asking the player to create a guild name (provided they are not already in one.). Once the guild is created, a Guild Manager window will pop up with options. GM's can promote, demote, kick, invite and transfer foundership. They can also leave the guild. Unknown if they can do this if there are still current members and foundership has not been transferred (will need updated information).