Ugh. Just noticed the pinned post. Sorry for “spamming”. This can be locked.
Go through all your lua files in your lua folder in \garrysmod, and check if there’s any suspicious files. If you’re scared that you might have been infected, just delete the whole lua folder, steam will restore a clean lua folder for you next time that you start Garry’s Mod.
Please take notice of that lua viruses can also come from addons downloaded, then the lua virus would be located under the addon’s lua folder instead.
Thanks, but I got it after I noticed the FAQ list which was in bold letters e_e