Name changing for gmod 13

I am wondering if any of u guys know how to change your gmod name thank you.

Garry’s Mod usernames, and usernames for almost every game obtained through Steam, are your Steam username. To change your Steam username, go to your Steam icon in the bottom right hand corner of your desktop screen, right click it and select “Settings.” Click the “Friends” tab at the top of the pop up menu and there you will see your Steam avatar next to a text field with your current Steam name. Simply delete the current name and type in your desired new username and click “ok” at the bottom of the page. This will change your username in nearly every Steam game, as well as Garry’s Mod and can be changed as often as possible.

Certain gamemodes allow you to use nicknames that are specific to the server. Admins of the server can help you with that.

thx mate