However, once you download the file containing the credentials and try to log in, one of two things happens:

Garry’s Mod relies heavily on Valve Anti-Cheat (VAC). Many "cracked" accounts come pre-loaded with hacks or are flagged by Steam for suspicious activity. If you log into a flagged account:

Most popular GMod servers utilize advanced anti-cheat systems and plugins that automatically block accounts with low trust scores, fresh profiles, or active community bans.

While you cannot get a free account, you can get on your own account using a legitimate Steam feature.

You never get a working, long-term account. Instead, you encounter one of three things: