what is GARRY'S MOD?

hello im not familiar with GARRY'S MOD..can you tell me what is this?

Sandbox game made by Valve that uses the source engine. Has a weird community with even weirder sub-communities. Just join random servers and see what's going on.

Sandbox where u can play with friends or play any other modification of the game like darkrp

GMod is firstly a sandbox where you can do what you want but now there are so many gamemodes like SCP or DarkRp and it makes the game so good

Garry's Mod is a sandbox game developed by FacePunch Studios (Not Valve) and published by Valve, it's known for the various gamemodes that this game has
Example: Trouble in Terrorist Town, Murder, Melon Bomber, DarkRP (The most famous), Prophunt , etc

Garrys mod this is a sandbox game where you can do everything that the engine and mods allows

garrys mod is the best game in the world buy this and play everyday bro !