Help with addons

When i download an addon im told to extract it to the addons folder. But i have no such folder in my garrysmod/garrysmod folder, i just downloaded gmod today.

Also when i do download the addon how do i activate it?

link to what im trying to download:http://www.garrysmod.org/downloads/?a=view&id=76605

Your add-ons folder isn’t in My Documents. You must navigate to “C:\Program Files\Steam\SteamApps{STEAM_USERNAME}\garrysmod\addons” and drop the files in there.

the newgmod does not have one addons folfer, just create one

i know that

read mine

If your addons folder is not there, then create it (like hackerPG said).

Run gmod once and it will create all the crap you need.