Quoted from Eric over on OGMW:
Ever taken over a game whose GM disappeared, leaving frustrated but enthusiastic players itching to carry on? Willing to do so for your fellow Weave members? Ever felt like it's unfair that GMs can recruit replacement players with ease, but it's hard to find the right GM to replace the deadbeat one in your favorite game? Join Mordae's GM Rescue Society, a resource for recovering abandoned and abused games here at Myth-Weavers.
What is this?
If you have a game with an active player base but no GM, you are welcome to post it here in the hopes that someone will decide to pick up where the former GM left off. The social contract with a new GM may look different than with the original GM, but the idea is that someone will pick up an orphaned game and try to run it to the best of their abilities and as close to the original player intent as possible.
What should I do?
Post a brief summary of the game's system, the module (if you are using one), the list of players involved, and something to sell your game to the people browsing this thread. If a potential GM sounds interested, try to take further discussions to the game thread, PMs, or Discord to avoid miscommunication and thread drag.
Thanks and Good Luck!