If gmpublish.exe does not accept your icon, try reexporting it with Paint or Paint.NET, that should convert it to Baseline. This must be a 512x512 Baseline JPEG image ( Progressive JPEG or a PNG image will NOT work! ). It is generally a good idea to do a final test of your addon before uploading it to workshop to make sure everything works properly.ĭoing so is easy, simply put your addon folder (in this example it would be called my_addon) into the game's steamapps/GarrysMod/garrysmod/addons/ folder and load up the game. Sample Addon is the folder you will need to provide to the gmad.exe to convert it to. My_addon is the folder you will need to input to gmad.exe or any other Workshop uploader and it's name could be anything, addon's name is defined on the Workshop Page for that addon and NOT by the folder name. You addon folder structure must look somewhat like this: (below is just an example)

Full file path whitelist can be found here:.

txt files are restricted too, except for vehicle scripts

You can only upload files that would normally be mounted by the game, except for:.

The structure of addon for Steam Workshop is the same as the classic addon system of Garry's Mod 12, except for those differences: Don't upload addons you didn't make, even fixed versions, without the author's consent. If you're going to make your addon public, please make sure it's unique and will add something new to Garry's Mod.

A folder anywhere on your computer containing addon files.

To upload an addon to workshop you will need the following things:

Crowbar (Unpack, Publish, and Pack) - Publish to Workshop via Crowbar (Guide)Īlternatively, the guide below describes how to upload addons to the Steam Workshop using Garry's Mod's shipped tools, gmad.exe and gmpublish.exe.

Garry's Mod Workshop Utility (Easy create, upload.etc).

LuaWorkshopper - Quick tool for Addon making and publishing.

Garry's Mod Easy Addon Uploader (for Windows only).

Garry's Mod Publishing Utility - Java based GUI wrapper.

gmpublisher (GUI for Windows, macOS and Linux).

Links to such known tools: (feel free to expand) You can use alternative tools such as GUIs (graphical user interfaces) made by community members to create, extract and upload addons to Steam Workshop. Please see this page for complete set of rules: There are a few rules before you start uploading addons.

This article will teach you how to prepare and upload an addon to the Steam Workshop.

How to mods for gmod