Gmod refusing to save settings. (Can't write to folder?)

I posted earlier thinking it was related to my graphics card, but I’ve ruled that out through some extensive testing and rage sessions.

Anywho, it’s not a gamebreaking glitch, but if anyone knows what to do about this particular issue, let me know.

Thanks for your time.

Maybe the config file is set to read-only. Navigate to your steam folder/steamapps/Your Account/Garrysmod/ and right click the config folder and check if read-only is unchecked. If not and it is checked, uncheck it and hit apply.

That was my first idea. It wasn’t checked when I first looked, so I tried checking it, restarting, and vice versa.