I think your best option is to combine your questions in different groups/forums.
Some questions will be more specific to your board (like pin configs and stuff) people on a beaglebone forum will be able to easily help you in that respect.
Then how to implement that knowledge in gambas is where we may help more.
Well the others can , I know not the information you seek , i just know the best way to seek it
I've never even heard of a Beaglebone black. Raspberry, Orange and banana Pi's I have (not as tasty as they sound)