Import PDF into Persepective

Is it possible to import a pdf into perspective?
Client would like to have a section for device manuals.

Yes - you must use the File Upload component due to browser security restrictions, but once uploaded you can do whatever you want with the file on the gateway.

Where does this file upload to on the Gateway?

You write a handler that chooses where to save the file, if at all. See the docs Paul linked to.