Adding PHX 3

I just downloaded the PHX 3 pack, and I have no clue where I should put the files, as I cannot find my Gmod local files for Steam. PLEASE HALP

C:\Program Files\Steam\steamapps{YOUR STEAM ACCOUNT NAME HERE}\garrysmod\garrysmod\addons

Or

C:\Program Files (x86)\Steam\steamapps{YOUR STEAM ACCOUNT NAME HERE}\garrysmod\garrysmod\addons