Summary

This guide explains everything you need to install GMOD addons properly:

• Workshop collection setup

• Linking Collection ID

• Manual .gma installation

• Fixing addon conflicts

• Performance optimization

• Common problems and solutions

Table of Contents

1. What is an addon?

2. Installing addons via Workshop

3. Creating a Workshop collection

4. Linking the Collection ID

5. Manual addon installation

6. Addon conflict issues

7. Performance optimization

8. Addons to avoid

9. Common errors

10. Recommended hosting

1) What Is an Addon?

Addons are extra features added to GMOD such as:

• Jobs, money systems

• Roleplay systems

• HUD & UI improvements

• Vehicles & models

• Maps

• Lua scripts

They are essential for customizing your server.

2) Installing Addons via Workshop (Best Method)

Workshop is the most stable and recommended method.

Benefits:
✔ Automatic updates
✔ Easy syncing for players
✔ Reduces crashes
✔ Cleaner management

3) Creating a Workshop Collection

Steps:

1. Open GMOD Workshop

2. Click Create Collection

3. Enter title + description

4. Add addons

5. Save

Getting the Collection ID

The ID is in the URL:
https://steamcommunity.com/sharedfiles/filedetails/?id=3234567890
ID: 3234567890

4) Linking the Collection ID to Your Server

Edit:

garrysmod/cfg/autoexec.cfg

Add:

Then add Steam API key to server.cfg:

5) Manual Addon Installation (.gma method)

For private or non-workshop addons:

1. Download .gma file

2. Place it into:
   garrysmod/addons/

GMOD will load it automatically.

6) Addon Conflict Issues

Most server crashes come from addon conflicts.

Symptoms:

• Lua Panic

• Console errors

• Missing textures

• Crash on map load

Fix:

• Disable addons one by one

• Remove duplicates

• Delete corrupted scripts

• Check console logs

7) Performance Optimization

Recommended addon count:

• DarkRP: 50–120

• Sandbox: 30–80

• TTT: 20–60

Avoid overloaded collections.

8) Addons to Avoid

Do NOT use:

• Leaked / cracked addons

• Old LUA scripts

• Heavy, unoptimized maps

• Abandoned addons

9) Common Errors & Solutions

Missing Map

→ Wrong collection ID
→ Player doesn't download workshop
→ Map not on server

Lua Panic

→ Broken addon

Addon not loading

→ Missing dependency
→ Script errors

10) Recommended GMOD Hosting

GMOD requires strong single-core performance.

✔ ServerTurk R9 7950X

• Very high FPS

• Low latency

• NVMe Gen4

• Full DDoS protection

• Ideal for DarkRP & Sandbox

https://serverturk.net/