File Extension Library

.GMA File Extension

  • Developer by: Facepunch Studios
  • Category: Game Files

What are .GMA files and how to open them?

Can't open .GMA file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .GMA file.

What is a .GMA file extension?

.GMA file extension is created by Facepunch Studios. .GMA has been classified as Game Files.

.GMA is Garry's Mod Addon File

Addon file used by Garry's Mod, a sandbox game that revolves around building random objects; contains data that modifies gameplay, such as character appearance, game modes, weapon skin, environment layout, maps and more.

You can create your own GMA files or download other users' add ons. You can download them through Garry's Workshop ( or through the Steam Workshop. Once downloaded through the Steam Workshop, the file is located in the\garrysmod\garrysmod\addons\ directory of your game. If you don't download the GMA file through the Steam Workshop, you'll need to manually place the file in the aforementioned directory.

List of all softwares that can open the Garry's Mod Addon File
Facepunch Studios Garry's Mod
Facepunch Studios Garry's Mod

How to fix problems with .GMA files

  1. You need to update the application that you normally use to open .GMA files. Only the latest version of the software supports the current .GMA file format
  2. You need to check the .GMA file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)