When I was trying to launch gluten free pizza, I was shaping the dough on parchment. then I'd flip the dough onto a screen and par-cook the crust. Cool it on a rack.
then I'd take it off the screen, top the crust and slide it back in the oven. I never got good color on the crust without the par bake and the par bake took a lot of the trouble with the launch away.
Not sure if you have a steel pan, but Detroit style GF has been my favorite GF so far. Very easy to launch!