Had existing gyno, and had it for about 6 years.
In that 6 years, I ran one cycle.
I am 2 weeks off of my last cycle and my gyno is definatly visibly less.
It use to be annoying, I could not wear a tight t-shirt, it's all I could see when I look in the mirror.
Now, tighter shirts, no problem at all, I can see it with my shirt off, but most people probably can't. It's now reduced enough, I'm comfortable with no shirt.
The cycle was:
1-14 600mgs EQ (weekly)
4-14 250mgs Test E (weekly)
4-6 50mgs Tbol (Daily)
6-14 80mgs Tbol (Daily)
14-16 300 UI HCG 3 times a week
14-18 20mgs Nova (daily)
Not only did it help my gyno for some reason, I also put on 26lbs and lost body fat. My diet is very clean and I did not work, so all i had to do was eat and train.
best 14 weeks I've ever invested into something.