Given these terms, it seems like you might be looking for or discussing a specific custom map or mod for Garry's Mod that incorporates elements from "Five Nights at Freddy's +1" (which could imply a modified or enhanced version of the original FNAF game).
To get the "Closet" texture working on the doors, ensure you have "CSS Content" mounted in GMod. Without Counter-Strike: Source textures, the office doors will appear as purple and black checkerboards. fnaf+1+map+gmod+link
A newer, highly polished version of the original. It focuses on accuracy and lighting rather than scripted jumpscares. Freddy Fazbear's Pizza Remake - Steam Workshop Given these terms, it seems like you might