Yes GDScript. Very few gotchas, very easy to learn and maintain in my head. I believe I had to recompile the engine a few times for various things, which took a bit more, but the game can be shipped entirely with GDScript.

Having used C++ and Blueprints extensively, GDScript is really a breeze. Of course games perform better if made entirely in low level C++, but as an indie you have to make a choice and you have to ship a game.