How many gigabytes is Garry's Mod?

Answer 1

I'm not quite sure. it requires alot because i have a computer with supposably a high ram. but gmod does not work because it is too low. sorry, that's all the info i can give you. but you could actually try to search in on the garry's mod wiki. =D

Answer 2

Garry's Mod 11 is about 150mb in size, but it imports the models, textures, etc. into the mod from other games installed on your computer that run on the Source Engine, like Half-Life 2 and Team Fortress 2. After it adds a large amount of that content it could end up being 1GB - 4GB, or even more, depending on how many Source games you have.