The line-up of artists appearing live at the launch at the club’s home, London Astoria, on July 1 also includes Honeyz and Louise, with more expected to be confirmed.
The launch party takes place after the annual Mardi Gras gay rally and one-day music festival in Finsbury Park, where all five performers will also be appearing at.
Set up eight years ago, G.A.Y. attracts 6,000 clubbers each week, and founder Jeremy Joseph commented that the album aimed to “bring together the greatest hits from the greatest acts that have performed at G.A.Y. over the years”.
Other acts appearing on the double album, which hits the shops on July 3, include Kylie Minogue, Spice Girls, Geri Halliwell, S Club 7 and Boyzone.