How does co-GMing work?
I have at least one, maybe two games which I've done extensive background work on and would generally like to move forward with. This is in addition to a game I currently run which is very demanding of me as the storyteller (and wouldn't be suited to having a co-GM). I would like to be able to find a GM (or two) to share in the vision of the games and have full autonomy as a GM to help run the game.
My only previous experience with a co-GM was with a player I knew IRL who primarily helped me with a rule system I was less than familiar with, who also had a player character in the game, and who wrote death scenes with particular flair for characters who died. Also, in a game my friend was running I helped out by making combat maps.
What I am looking for is advice on how to better run a game with a co-GM who is taking on a nearly equal role, sharing in adjudication, able to post for any NPC's, setting scenes, etc.
What experience do any of you have with co-GMs? What have you found that has worked well? What should be avoided?
Any and all insights are appreciated here. Thank you. :)