What is the fastest way getting to Shaoguan from Guangzhou Baiyin International airport? Thank you.

Since there is no direct shuttle bus. The bullet trains are the best method.
In my opinion, you can take the GZ Subway line 3 from the airport to Jiahewanggang Station and change to line 2 to its terminal at GZ South Railway Station. From there, frequent bullet trains for SG can be found.

Thanks alot for the information which was extremely useful.