The game is currently available for China and Taiwan with no news for a global released announced as of yet.
For those outside of the region, you can download the game on QooApp and claim their launch rewards which includes a 5-star Gunmen and a free ten-pull.
This the first ever mobile game to series and it lets the you experience the entire plot of the Gurren Lagann series and this time, you can even establish your own Gurren Lagann group.
Tengen Toppa Gurren Lagann RPG is a turn-based strategy game where you deploy your Gunmens in a 9×9 square grid to fight off against enemy Gunmens. There is also gacha present where you can use the premium currency to roll for Gunmens such as Gurren and Lagann, and add them to your team.
Tengen Toppa Gurren Laggan is a mecha anime by Gainax that premiered in 2007. The story follows Simon and Kamina in their journey across the surface world together with their Gunmen after escaping their lives of living underground. They would then create Team Gurren that would eventually pierce the heavens.