- 
Addons go in /garrysmod/addons/
- 
You can also load entire Workshop collections via the startup parameters 
- 
To use a Workshop collection: - 
Create one on Steam 
- 
Add the ID to your +host_workshop_collectionstartup flag
- 
Make sure to include your Steam API key in config 
 
- 
Restart after applying changes to load everything properly.

.png)