Jesse McCartney的<Leavin>歌词的问题

''Flyin' on the G5, G5'' : ''It's a private jet -- a G5 is an airplane,'' he says. Specifically, the Gulfstream G500 business jet. He's telling the girl he wants to fly her first class. 所以说G5应该是一种飞机的型号，不过G5多少带点英式的语言习惯，Jesse McCartney是美国人，可能在这句歌词中不是这个意思哦.