I'm calling shenanigans. I used to work in a lab where we had GPS repeaters to test consumer equipment. That alone costs big bucks. And, we had the FAA come down on us big time, because our GPS repeater broadcast outside the building too far and we got into some hot water.

If you were spoofing GPS campus wide over 1.544 GHz and had all your GPS sentences correct, with simple radios and antennas... and you hadn't got in trouble with Uncle Charlie or the FAA....