Hi Tripp,
Yes, gunners joined the Fighter Pilots' Association. I think it is very likely that this is the same man - Hermanns is not a particularly common name (2,000 people with that surname in Germany today), so the chances of there being two men named Hermanns who both served with Z.G. 76 and were both alive 70 years after the war are pretty slim. Definitely worth sending him a letter or having a German speaker give him a call, I would think, just in case it is your man.
Cheers,
Andrew A.
Air War Publications -
www.airwarpublications.com