This is a problem that had occurred a while ago for me. I thought I fixed the problem by buying a new keyboard, but alas, the problem still exists, and it is fucking driving me up the wall. Basically, the ESC key will just stop fucking working for no good reason in-game. This not only occurs in GMOD, but in all other Steam games as well, and as you may well know, the ESC key is very important in accessing main menus. The lack of an ESC key would mean it would be very bothersome to exit a game or to configure it.
I don’t know where to start with this, honestly. If it happens to two different keyboards, it must be something wrong with my computer, but I really have no idea what in the hell could cause something this strange. If anybody has any ideas, please help me out. I’m going insane trying to figure this out.