side effects from gh are very dose dependent. if you are taking a moderate amount, say 5iu or less, i dont think you will experience much more than initial fluid retention, much of which will subside over time. i have heard that gh can bind to the prolactin receptor but i have never personally known anyone who has gotten prolactin based gyno  from gh.

from what i have seen in people, the older guys seem to get more of a rejuvenation effect from low replacement doses(2-3iu). if you are not using anabolic steroids, i wouldnt expect muscle gains from gh. gh alone will help with fat loss and IME, will help with the overall quality of things like skin, hair, finger nails, but i would not count on it for increasing size.