Edit Your Garry's Mod Server Command Line
The Command Line Manager controls how your server starts up. You will need a custom command line to configure settings such as the gamemode, startup map, Workshop Collection ID, and GSLT. See Create a GSLT if you also need to set your Steam token.
Steps
1. Log in to the Game Control Panel and navigate to your server.
2. Click the Commandline Manager module.
3. Switch to the Custom Commandlines tab.
4. Click New to create a command line, or click an existing entry to edit it.
5. Configure the desired parameters (gamemode, map, Workshop ID, and so on).
6. Click Save, then click Select next to the command line you want to activate.
The selected command line will take effect the next time your server starts.