""A more detailed view, popularized by R. Lee Ermey on his television series "Mail Call", disputes this "slurred GP" origin, saying that the vehicle was designed for specific duties, and was never referred to as "General Purpose" and it is highly unlikely that the average jeep-driving GI would have been familiar with this designation.The Ford GPW abbreviation actually meant G for government use, P to designate its wheelbase and W to indicate its Willys-Overland designed engine.