"We've had one or two [double dates]," Joe told ET at the iHeartRadio Music Fest in Las Vegas over the weekend. "They're awesome!"
Just last week, Joe stepped out to support his lady love as she walked in Tommy Hilfiger's show during New York Fashion Week.
"[Gigi] walked in Tommy [Hilfiger] -- she walked in a bunch of shows -- but I was able to see her walk in Tommy and it was great," he said. "Just being able to support and see some of my favorite designers, it was great."
Meanwhile, Joe has jumped back into the pop music scene with the insanely catchy new single "Cake By the Ocean" from his new band, DNCE.
"It's been a secret for a while," he said of the project. "I've wanted to release music before, but it wasn't ready yet and I just wanted to take my time. I was doing some soul searching and this came together perfectly with these guys, and once it was there I was like, 'OK, it's time. This is gonna be great.'"
Even Joe's brother, Nick Jonas, couldn’t help but gush over the new music.
"DNCE is amazing," the younger JoBro told ET. "I'm so happy for him. The fact that we can both go and do our own things now -- and Kevin with his family and what he's doing – it’s a beautiful thing to get to support each other and have these next steps."