Yes, but the difference is that Gorgans know nothing. They don’t have access to Gillian, and the ones who think they have a source are being fooled by one crazy person who was a Gillovny “source” (a liar) before she was a Gorgan source. So it’s different.
If you take Walt and Laurice aside, Duchovniacs are just fans who goes to the concerts and can approach David. They even crowdfunded a private concert. So them lying about Monique would mean they either willingly all together decided to spread this huge rumor in the fandom just for fun, which makes no sense to me as most of them are middle aged women with kids, jobs and life, or David has asked them to lie to the fandom to cover up Gillovny, which is completely crazy.
I guess it could be that David and Monique are lying to them to make sure they report this false information to the fandom, but what for?
To me, the only explanation that doesn’t sound like a crazy conspiracy theory is that David is dating Monique and they both find it completely appropriate, at least enough to not be hiding it from the fans. Good for them.
Just Holding Hands 