^^^ no guys and gals store fat in certain areas.
most men store fat in the glute, thights and yes the stomach.
i do not believe where you are injecting has any affect on it.
why are you using HGH? i don't feel its necessary at all. a simple fix of your diet and training would be the proper way to proceed. i can tell by your pics you do not work your legs very much or at all.. your upper legs are smaller than your lower legs!! need to hit the squats, deads, cleans, etc. if you want to release growth hormone thats the way to do it.. you don't need HGH at your age!