I have plenty of photos of Gulfstreams and a few photos of FAA jets – mainly flight checking Learjet 60s.  However, the FAA Gulfstreams have not been something I have seen a lot of.  I did have a nice chance to shoot one at Washington National many years ago, though.  I did see the jets on the ramp at the south end of the field occasionally but I think this was the only time I got one airborne.  It was shot from Gravelly Point so I was nice and close to it as it was on final approach.  That is a great place to shoot from (or just hang out and watch the planes) and I will have to get back there at some point.