Installing Addons Print

In this guide, I’ll show you how to install and manage Garry’s Mod addons from the Steam Workshop using the FinnishHost Game Panel. This includes both individual Workshop items and full collections.

Step 1: Find the Addon or Collection

Visit the Garry’s Mod Steam Workshop page. Copy the numeric ID from the item’s or collection’s URL, for example:

https://steamcommunity.com/sharedfiles/filedetails/?id=123456789

In this case, the Workshop ID is 123456789.

Step 2: Add the Workshop ID

You can add Workshop items two ways:

1. Via the Commandline / Startup Parameters: Add these two parameters:

   +host_workshop_collection 123456789 +authkey YOUR_STEAM_API_KEY

   Replace the ID with your own collection and your valid Steam API key from https://steamcommunity.com/dev/apikey.
2. Via the Configuration File: Some setups use workshop.lua or a Workshop config file. Open Configuration Files and edit it to include:

   resource.AddWorkshop("123456789")

Step 3: Save and Restart

Save your changes and restart the server. You’ll see download progress for each addon in the Web Console.

Step 4: Verify Addon Download

After startup, join your server and confirm the content appears correctly. If you see missing textures or models, check that all required dependencies were included in the Workshop collection.

Step 5: Update Addons

Workshop addons update automatically whenever you restart your server, but you can force an update by clicking Update Server Files in the Game Panel.

Step 6: Troubleshooting

• Addon not loading? — Make sure it’s part of a published Workshop collection.
• Invalid API key? — Ensure the key matches the Steam account that owns the collection.
• Missing models? — Check for required base packs (CSS, TF2, HL2 content, etc.).

Notes

We provide support for hosting, Workshop setup, and startup only. We don’t provide support for broken or unmaintained addons. Always back up your Workshop ID list before major updates.