Not go pro, but I've been using a suction cup camera mount I bought online for over 2 years now.
It's fallen off once in that time but I have the camera tethered to the board.
I am trying to capture images of any wildlife (hopefully dolphins) I come across, so either have it at the back looking forward like above, or forward looking forward.
It's actually a combination of a suction cup mount and a large ball head to get the camera a bit further up.
Its now rusted almost solid but still working.
I have added tether points using small Stick It loops to a few boards.
The resultant camera angles can be a bit bizzare, but it would work forward looking back.
My teenage daughter has warned me that if I do that the result would be unacceptably close to a selfie.
The wider angle lens on the Go Pro would probably get all of you in the frame from the front looking back.