Incase anyone is interested I have the BlackGold BGT3602/3600 working in vanilla LibreELEC 8.0. The changes to get it to compile with latest media_build package were actually pretty minimal, just minor API changes. I went with patching vanilla LibreELEC as I couldn't work out your init changes.
fHMZ is the diff.
Very happy that I can continue to use this card as it cost a load of money and has four tuners..
Hello alcoheca - I have a blackgold four tuner card and am desperate to get it to work with LibreElec. You link (fHMZ) no longer works. Could you point me in the direction to get my tuner to work please? Thanks!!!!