that is relevant... how?
Fuck, iunno why it did that. Im on my iphone, it obviously fucked something up.
I said one thing you could so is navigate to your steamapps folder and rename garrysmod to garrysmodold. Then, thr next time you run gmod from steam, it will make a new gmod folder without downloading shit. If it works, then copy over your addons and data folder from the old one to the new one. Usually works for me when I get any number of errors, from crashing on startup to texture errors.