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How to upload to Workshop [EASY]
By Vortex
Finally, you actually found a guide to uploading files, maps, and your addon to the Steam Workshop! I'm going to keep this simple, so you're going to have to download a program called The Garry's Mod Publishing Utility, created by the great 'alatnet'!
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**IMPORTANT DISCLAIMER**
WARNING! If you upload, or possibly update, multiple addons within a short span, you will have the potential to be temp or perma banned from the steam community, so I would suggest to space out your uploads.
What you'll need and where to get it
Preparation
Keeping it simple, make a folder on your desktop named "Workshop" as we will be putting all our files in here for simplicity's sake.

To prepare for your upload to workshop, you're going to need a 512 x 512 .jpg image of your addon, what people will see that will best represent your work. Something that has it's name it it, or something to really grab their attention. It's up to you.

If you knew what you're doing when you created your addon/map/tool, you should have all of your things, neatly folder'd up, like so:
Addon/Lua/files and other blah
*It doesn't have to be this way, though it will help to keep things simple and manageable.

Let's get Uploading!
All sytems go! Assuming you prepared correctly, downloaded The Garry's Mod Publishing Utility, and unzipped it, we're going to be looking inside the gmpu 1.1 ZIP for a file called gmpu.jar, and moving it into the folder previously mention 'workshop'

Rename it if you wish (I renamed it Garry's Mod Publishing Utility, but that's just me) and open it.

A long, rectangular menu should pop up, similar in look to Minecraft Modloader, DON'T PANIC!!!

Here's what to do:
  • Under gmpublish's path, click Folder, and in the 'Choose gmpublish path', go to SteamApps\common\GarrysMod and click the 'open' button on bin. Don't go INSIDE of bin, Click Open on Bin! The pathway should read C:\Steam\SteamApps\common\GarrysMod\bin or something similar to that.

  • Now, under gmad, we're going to do the exact same thing, Directory C:\Steam\SteamApps\common\GarrysMod\bin just as before.

    Once your paths have been set, click 'Ok'


    Now a much larger menu should appear! Take a moment to read and understand what everything is.

    The top left options, under Mode, you'll see Create, Create GMA, Update, and Extract.
    Click each one and notice the different options in the menu go inactive.
    When you're done, set the Mode to Create to continue.

  • Next step is to select your folder containing your addon's files. Under the empty 'Addon List', click 'Folder' and go into workshop and click 'open' on the folder with the addon name.

  • Right below File or Folder, you should see Icon. Here is where you will load the 512 x 512 image mentioned earlier. If done correctly, you should see the image appear in the Icon Preview.

  • Under Addon.json, simply select the type and tags that best represent your addon.

  • When all of that is done, click "Add to Queue" and in the top right you should see under 'Queue' your addon, ready to go! Click the name under 'Action'/'Job' so that it is highlighted/selected.

  • Click 'Execute' and it will upload to workshop, seeing if you did everything correctly!

Making your Addon Public!

With steam have already been open and running through the entire process, go to your workshop, look for your addon, and under owner controls, in Change Visibility, set it to Public, and just like that, you've uploaded an addon to Workshop!

Credit to Alatnet for creating the GUI!
93 Comments
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Spacemike 1 hour ago 
how do i get the addon to display in the addon list?
nicohaddou Aug 7 @ 9:21pm 
what if i want to upload a skins pack?
Vortex  [author] Jul 25 @ 5:49pm 
Like a day or two
D3athChick3n Jul 18 @ 3:31pm 
How much time would you recommend between each upload?
[SSK] annilator3000 Jul 17 @ 2:55pm 
Please, i have my picture in .JPG and it is 512 x 512 but it say "Couldn't load icon - is it a jpeg?"

Help me !
Vortex  [author] Jul 16 @ 1:30pm 
Thanks, and have fun!
Cevadar Jul 16 @ 9:39am 
Shitty tutorial, doesn't make sense. Learn to construct proper sentences. What a waste of time.
Vortex  [author] Jul 12 @ 7:49pm 
Help? Check the thread, look for the problem, get it solved! I have a life, and cannot individually help solve any problems with it, sorry.
[NaKb]Miss KampfCurryWurst Jul 6 @ 8:59am 
File list verification failed what is this ?? help :(
It says it has sent it to steam but i cant't find it.