In order to learn about high speed PCB layout and routing, it will be very helpful for the community if Banana Pi will release a PCB files, layer stack files or at least a gerber files. I understand that Banana Pi cannot do that for boards in production, but for M2 you it is time because the board production is discontinued. So please do this and we will tell you a big thanks! 
Banana pi BPI-M2 layer stack files and gerber files
https://drive.google.com/file/d/13MgTpPPaKJ5NoVcKycUhEX8Bikp4sZXa/view?usp=sharing
Hello,
It is possible to release the files for the M2+ even privately ?
Thank you! Have a good day!
I am also interested in the BPI-M2 Gerber files, even if not complete. I need outlines and some part placements for CAD modelling. Would be appreciated.