Let It Shine ended its run on Saturday night on BBC One after seven weeks of singing.
Five guys were cast in the roles of a new musical called The Band, based on the music of Take That.
Gary always said that the musical was not about Take That itself and it turns out it's not actually about any band at all.
Instead, the new musical focuses on five teenage girls who are fans of the group.
The boys from Five To Five who won Let It Shine will star alongside the leading ladies, who are in the process of being cast away from TV screens.
Gary revealed: "The interesting thing about what these guys are gonna do is, there's no spoken acting for these guys at all. It's all done through song which is interesting for us because, especially tonight when they did a song from a musical, how do you act out a song? They did brilliantly.
"We've watched them come on every week, and when we started this process, when you think of the risk we've actually taken, I hope for a really good band, we've got a brilliant band."
And he told DigitalSpy: "My email is full of offers for these guys, every major record company has already been enquiring. Their role will go way beyond this musical, and that makes me proud. Because that means within this show, we're actually making careers and giving people a real chance."
Meanwhile, Gary revealed how some Let It Shine contestants who didn't win may still end up in The Band musical.
"We're having three understudies who are gonna be joining us, hopefully from the show, hopefully from the bands that have been there tonight. I've cast for two of my musicals, I've cast people that have been in this series already," he said. "I know there's interest in all the finalists that have been on stage tonight.
"Lots of interest from agents, I feel like we're gonna see some great careers from this."
The Band Musical will tour the country from September 2017 and finish its opening twelve month run in July 2018, with dates across England, Wales and Scotland.
Tickets go on sale from 3 April 2017 at 12PM from the Band Musical's website here.
The Band musical tour dates
As for exactly what we can expect from the stage show - other than Take That's songs of course! - Let It Shine judge Dannii teased: "I know everything about the show - but I can’t say anything!
"It’s so exciting and will be totally unexpected. I love what the whole show is going to be about. Having it explained to me fully, I was moved from tears to laughter just sitting there while he was talking to me about it.
"So once they get all the right performers in that show and get it up and running, it’s going to be incredible."