Become Admin in Garry's Mod
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On this page we show you how to become an administrator of your server.
Your Steam ID
You can get your Steam ID in the following link: https://steamid.io/
Simply enter your Steam username, and lookup for the results, there you will find your Steam ID.
Add yourself as an admin
Now, you will access your Garry's Mod server Web Interface, and you will access your Config Files.
You will need to edit the file
Here you will have to replace the steam ID example from there
“STEAM_0:1:7099” with your Steam ID. (Screenshot below)
Once you add in there your SteamID64, you will make sure to click on save changes, and then you will restart the game server, so the changes can take effect.
You should be an admin now in your Garry's Mod server.