shuttle bus from Guangzhou baiyun airport to nan gau hotel pazhou

To be honest, I did not hear about the hotel you said. Do you refer to Nan Guo Hotel at No. 161 Pingyue Road, Pearl River?
If so, there is no direct shuttle bus to reach your hotel. It is suggested to take the local subway line 3 to reach Zhujiang New Town directly and then change to line 5 to reach Tancun Station. Get out of the station from Exit B and walk along Pingyi Street to reach your hotel easily.