Is there direct bus from GZ Baiyun Intl Airport to Dabu? If yes, is there bus schedules available?

From the airport, there is no direct buses to reach Dabu. But you can take the bus from Tianhe Bus Terminal to reach Dabu.
From the airport to Tianhe Bus Station, you can take the subway line 3 to reach West Tiyu Road, where you can change to northeast branch to reach Tianhe Bus Terminal to take buses for Dabu.