Yes, it aired on election night, like I said.
If you want to re-watch it, it's season 9, episode 27, "The Tosh.0-lection Special". I think it's still viewable on Comedy Central's site in the United States and on Much's site in Canada, plus whichever other streaming services it may be on and there may be Bittorrents and such.
It was a pretty straight interview by Daniel Tosh standards, going over the absolute basics of Gail's beliefs (both her own delusions and the expanded universe content from the scripters) and showing very short highlight clips from her Youtube channel but he didn't say anything to make her question her worldview, not that I was really expecting Tosh to go all "Dr. Phil" on her. I think the closest Tosh came to challenging her beliefs was that Gail talked about how Channel 0 outside of Florida is the "Gabrielle Chana Fox News Channel" and Tosh said something to the effect of "There's a Channel Zero"?
I should add that the interview was just in a room with windows that looked down on the street below, Tosh wasn't pretending that the room was part of the Church of Gail or anything weird.