follow this simple tutorial
1 - Open “My Computer”
2 - In “My Computer” find and open “Local Disk (C:)”
3 - In “Local Disk (C:)” find and open “Program files (x86)” if there is no “Program files (x86)” then open “Program files”
4 - In the folder you opened, find and open “Steam”
5 - In “Steam” find and open “Steamapps”
6 - In “Steamapps” there should be a folder that is the same name as your steam username. Find and open it
7 - In the folder you opened, find and open “Garrysmod”
8 - In “Garrysmod” find and open “Garrysmod” (Yes I know, theres 2 garrysmod folder, it DOES matter which you put the files in)
9 - drop all the files/folders you downloaded into the second “Garrysmod” folder (the one currently open)
If you still have questions, please tell me and I will stuff your brain into a blendtech blender. Seriously, I will. I will videotape it and put it up all across the internet. Don’t worry, I’ll let you watch it first.
EDIT: Now that I think about it, I’ll prolly get banned for this but oh well. At least I helped him which is more then any of you guys can say!