How do you download things onto Gmod?

I’m new here and I’m just curious because I want the HAAX!!! Swep v1.2 and I don’t know how to download it. Please help.

If it has a info.txt file in its folder, drop that folder into the addons folder in your Garry’s Mod directory. If it doesn’t then you’ll have to put it in the correct places in the directory. Normally just take the folder that says something like Materials and drop that folder into the directory and let it overwrite and so on for the others.