Even single engine Cessna aircraft have autopilots. I find this very hard to believe. Even the MS FLight Simulator version has an autopilot. Perhaps he meant autoland?
Many of those single engine Cessnas are coming of the line with 'glass cockpits' as well...something even CO's 737-500 doesn't have.
Gulfstream is pretty cheap...most of those FO's you see are getting paid $8.00/hr and have paid mucho $$$ to Gulfstream for the privelege of working there.
http://www.gulfstreamacademy.com/First_officer.php