delete or disable some of your addons
Gmod still works for me, so it might be something on your endDid you do install anything between when it worked and when it didn't? NopeHave you tried disabling all of your addons? Nope, im going to try.Have your tried verifying the game files?
Have you tried disabling all of your add-ons?
What map are you loading?
verify integrity of game cache
Uninstall the game and make a backup of all of your subscribed addons, and then unsubscribe. Reinstall the game and report back.