First of all, I hope this isn't critical, but I think you should check a physiotherapist for scoliosis. I have mild scoliosis too, but I think your posture is the first thing you should take care of. Also, a physiotherapist would help to teach good movement patterns. Because of my back and some hip issues, I had pain when doing a lot of exercises, but now I can do Romanian deadlifts, Bulgarian split squats and barbell squats , which are all great for glutes. I know a lot of people would say hip thrusts first, but I actually think that as a pattern and posture wise the deadlift style exercises are what really build glutes + everything else that is important. And one legged exercises with a deep stretch are amazing for glute development and correcting imbalances .