Jesse McCartney的<Leavin>歌詞的問題

''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. 所以說G5應該是壹種飛機的型號，不過G5多少帶點英式的語言習慣，Jesse McCartney是美國人，可能在這句歌詞中不是這個意思哦.