I want to go from Humen to Zhuhai Gongbei railway station or by ferry how can I go?

Well, there is no ferry between these two places.
So you need to take long-distance bus at Humen General Bus Station to Zhuhai Gongbei Bus Station first. The schedules respectively are 7:10 to 19:40 with the interval of an hour. After that, you can spot the Gongbei Railway Station easily.