It sucks, from what I have heard, I mean come on any type of gel or cream is not going to be as effective as the real thing. IMO why not take andro if you are gonna do something like that.. Anyways, I am not trying to flame you bro, but if you do some research and knwo what your goals are, with proper diet, you can acheive what you want. If you are not ready for As, I applaude you on that. While I have done AS for many years, I dont' encourage it, or try to make anyone do those sorts of things without proper research and determination.
There are a ton of suppliments out there (they aren't as good as the real thing), but can help get you where you want to be or close anyways. ZMA is an awesome product from what I have seen and read. I don't recall you disussing your goals fully on what you want, and what I got out of it is you want to on some pounds? EAT EAT EAT. But don't just eat, eat clean, but up your calories, increase your intensity of your workouts, and you will see results. Throw in some creatine, and maybe some 1 AD and you will get what you want, with enough hard work and determination. Maybe afte a few years of doing it naturally you will be ready for the next step. Take your time bro, you are still young, I don't recommend anyone considering AS until about the age of at least 35-28 years old. Good luck amigo, and stick with it.