Type 8800gtx or 8800 in the search bar of your prop menu to get access to the prop.
An 8800 GTX box prop that my friend requested me to make for his map. Use it in your maps if you wish or play around with them in gmod.
The only problem is that the front and back panels of the box are flipped upside down towards eachother. I was working on this too quickly and forgot to check. It's not a big deal, I will ignore this for now since it's minor.