R0d0t please give me pcb. I am not buy I want a make it. Trust me I am not steal it or are you gonna give it us?
If you want to add extra hardware or hack your Gamebuino META, you have access to all the GPIO on the back. You can get the layout and labels with the Developer Backpack.
Tell me what you want to do and i'll give you the info you need. This has already been answered here :)