Connect your phone and PC to the same 5GHz Wi-Fi, link them via the app, and launch GMod from your Steam library.
Do not risk your personal data and the security of your device for a broken, pirated experience. The technology for a native ARM port of the Source Engine is not there yet, and until Facepunch announces something official (which they have said they won’t), every "download link" is a trap. gmod android port download link
to play GMod via the cloud if you have a stable internet connection and own the game. Moonlight/Sunshine Connect your phone and PC to the same