Gay Rest Area Pit Stop or Gay Rest Area Penis Stop. It is well known in the USA that many rest areas are frequented by homosexuals looking to either get or give a quick BJ. The signs are all there, usually written on the side of the toilet stalls, often with numbers of local homosexuals eager for a sexual encounter in a public place.
Furthermore, a GRAPS can be any gay sexual encounter in a public restroom.
Famous people caught in the act of trying to get some GRAPS include Former Republican Senator Larry Craig, who was snagged in an airport attempting to get a GRAPS. Also, singer/songwriter George Michael was arrested attempting to have a GRAPS.
Gay truckers like to make GRAPS at that particular rest area.