>>4474519 (lb)
>>4474569 (lb)
http://www.gulfstream.com/special-missions/recent-programs
Aircraft is painted the same as AF1/AF2. There are three of them @ Andrews AFB.
https://en.wikipedia.org/wiki/Gulfstream_G550#Government_and_military_operators
United States Air Force – one specially equipped C-37B used as VIP transport including the President