Although I have no personal experience with it, Letrozole is one of the only realistic options that I have seen people have actual reductions with..
Also, it seems that the shorter the period that you have had gyno in addition to what kind of gyno you have somewhat correlates with the chances of you getting rid of it non-surgically -- maybe a better example is, I think the number of individuals in their early 20's or so, with stable hormonal levels, who have PUBERTAL gyno will see less than adequate results from gyno treatments with the exception of surgery.. I remember reading somewhere that the longer the tissue is allowed to remain undisturbed, it becomes more difficult to remove with supps, drugs, etc..
I'm no expert on gyno, although I have a sufficient case from puberty, but if this was steroid induced, I would say Letro is your best bet..
I believe RenegadeRows also made a nice post about the method he used to reduce his gyno.. I'll try and find it for you.
EDIT: Invalid Link Removed