I have been struggling to find any support for GPIO on NanoPi Fire3 with S5P6818 SOC

My experiments have been in Python just trying to get basic access, but no luck so far. I have installed a few libraries, but have not found any success.

Is there any functional support for Friendly Elec devices or am I on my own? If it helps...I need thousands of units per year for my project. That cannot happen without some solid support.

Fingers crossed someone can point me in the right direction.....