Can I get the bus/shared Taxi from Guangzhou to Hong Kong Airport?

Yes! You can take a bus to HKIA from many spots, including Dongshan Hotel, Hotel Landmark Canton, The Garden Hotel, China Hotel, etc. The trip takes 3.5 to 4 hours. The fare is HKD 210 to 250 per person for the single trip. You can book the ticket in advance at the official website of HKIA.

The distance is about 112 miles (180km). You can also charter a car for the trip. The fare may be around CNY 1,800. I heard that King Tin China HK Rental Car Services Company can provide such service. You can contact them through kingtinkingtin.com. Or dial at (852) 3188 4897 to book one. Good luck!