is there a subway from guangzhou train station going to Baiyun airport?

From the GZ train station, you can walk to reach local Civil Aviation Ticket Office easily where you can find the direct airport express line 1 to take you to reach the airport directly.
Or you can choose to take the local subway. From the railway station, you can take the subway line 2 to reach Jiahewanggang Station where you can change to line 3 to reach the airport directly.
Hope it helps you.

hi, jerry thank you for quick reply