Wirelessly posted (iPhone 4: Mozilla/5.0 (iPad; CPU OS 6_0_1 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A523 Safari/8536.25)
Here comes the exact hotel shuttle schedule
http://www.marriott.com/hotelwebsites/us/h/hkgap/hkgap_pdf/map_hongkongairporthotel_HKGAP.pdf
Alternatively you can take one station airport express to the hotel or take a taxi ride