Get the Fun Out of Garry's Mod Online

This article will teach you how to get the most out of Garry's Mod online multiplayer.

Steps

Buy Garry's Mod 13 if you don't already own it. You can buy it on Steam for $9.99. http://store.steampowered.com/app/4000/
Find a server you may like try out and play. You can also find many other different game modes to play.
Learn how to play the type of game mode the server is hosting. Some servers have a "MOTD" that appears when you first connect that can explain how the game works.
Try to meet new people and make friends. Having friends to play Garry's Mod makes it a more enjoyable experience. Every player you meet is different, some players may be nice and friendly while some may not be as friendly to new players.
Try to earn some of Garry's Mods Steam achievements. Achievements serve no direct purpose in Garry's Mod, but they can be fun to earn! Playing in a Sandbox server can help speed up the process of earning an achievement. You even get an achievement for playing multiplayer for the first time.
Explore the vast amount of multiplayer servers Garry's Mod has to offer. Many servers support the same game modes, but usually offer a unique experience. You can find game modes ranging from casual role play type games, to fast paced death match.

Playing the single player section of Garry's Mod is a great way to learn the basics of how Garry's Mod runs.
Most servers have various rules. Usually the server rules will be shown when you first join, however it may help to ask another player what the rules to the server are.
If you find a multiplayer server that you would like to play on again, you may add it to your favorites list from the "Favorites" tab. You can also find the server in the "History" tab if you choose not to favorite it.
The Steam Workshop is a great tool for easily installing Garry's Mod addons. You can install these addons without ever having to leave the game. Addons can be found at by pressing the "Addons" option on the main menu.
Some servers may have "administrators" present who might enforce how they want the server to operate.