Garrys Mod Addon UploaderGMA_Uploader
This program lets you upload Garry's Mod addons with just a few clicks. You just have to choose in a very simplified GUI application, the addon folder, the icon, tags, title and type and you are ready to upload to steam workshop. You need just the folder with your content and an image thumbnail 512x512.
You dont even have to make json, it will generate one automatically.
Merry Christmas :)
Created with C#
Please read the README.txt for more information.
Feel free to ask or comment anything you want here.