Some have tried it - maybe I saw it on the Facebook group. One spouse has it on a TSR-1 since the GT-1 is not yet available. Maybe someone that actually tried it in a GT will respond. Common knowledge it is a higher launching version of the Denali Blue.
True Temper didn’t have information on it 2 weeks ago, just blue and black. I’m curious if it specifically replaces a TSR shaft in the Titleist matrix, like the HZRDOUS Red.

I was fitted yesterday and into the Denali Red 60 GT with the GT3 head…came from a TSR3 with the Tensei shaft…brought my spin down a bit from my TSR3, slightly more ball speed, but overall, the club just felt so easy to swing…it felt like I was just taking a swing and barely noticed the ball was hit…