I can't see the enlarged pic since I'm not plat anymore, but I think I can see it in the arm pic.
There's unfortunately no med that really works for pre-existing.
You can try Yohimburn. Its a topical sticky cream that you rub on daily. Do a search on the anabolic board for it. There's lots of info.
However, chances are, if its natural gyno, it will remain the same size while your pecs grow. Bigger pecs(less bf helps)=smaller gyno=less visible boobies.
Gyno surgery is expensive, and most insurance companies consider it cosmetic, therefore they won't pay.