IF ANYTHING, it wont totally get rid of your gyno. Even people who said it works only stated that it went down "SOME", it could be something as simple as loosing the water in there, but if there's gland, you will always have that problem to an extent. I cannot see it reducing gyno back to the normal state.
If you decided to try rebound, then i would recommend seeing a doctor first. Either way i wish you best of luck.