This guide will let you know how you can play Garry’s Mod with your friends. Go through the guide and follow all the instructions to play the multiplayer game.
The first thing you will need to do is to start the game and download addons from the steam workshop. Make sure that you and your friend download the same mods.
After downloading the mods, you have to click on “Start New Game” and select the map that you want to play.
The next thing you have to do is to make some changes in the settings. Set the players to 2 and check the Peer-To-Peer and Peer-To-Peer: Friends Only checkboxes.
After that, click on the start game. Once the game starts, you have to go to Friends, right-click on your friend and tap “Invite to Game”.
Now you can enjoy the game with your friend.