Hey man,
I thought you mentioned on a previous post that you had had your hormones checked and everything was fine? I don't think that gland tissue can grow back once it has been removed, so I think you'll be OK even if your hormones are not balanced out properly. I'm not expert and it is probably worth asking the surgeon at the consultation.
However, you should really ask your GP to refer you to an endocrinologist to get your hormones sorted out as it even if you get your gyne sorted with surgery, having too much oestrogen could cause you problems down the track (fatty butt and thighs, and even some cancers...). Apparently there are 'natural' ways of balancing your oestrogen levels. Here are some suggestions based on advice from a guy called Charles Poliquin, who has got a lot of cred in the bodybuilding community - take it or leave it (not sure if I believe it...):
Eat at least 4 servings of steamed cruciferous vegetables a day. This would include watercress, broccoli, cauliflower, sprouts, kale, turnip, collards, cabbage, and radish to name a few.
If you're a drinker, switch to red wine. Red wine contains resveratrol, which acts as an Aromatase inhibitor. A glass of red with dinner may actually help reduce the circumference of your chest area. Also, if you are a beer drinker you will find it very difficult to get out of your man-bra until you cut back, or cut it out
Green tea - Green tea is loaded with antioxidants which have anti-carcinogenic effects. They also help with the detoxification of oestrogens
Supplementation - Supplementing your diet with either DIM, Curcumin or Grape seed extract has been shown to reduce the pectoral fat in males!
Fibre - Adding up to 30 grams of fibre from varied sources will help "pull" out foreign oestrogens from the body.
Eat organic nuts and wild meat whenever possible. This is a great way to naturally boost your testosterone levels. However, as it is quite difficult to do this nowadays, it is recommended to supplement your diet with Zinc.
Increase your testosterone levels...the legal way. This means hitting the weights 3 or 4 times a week
I would have thought that your GP would have at very least advised to lay off the beers and get some exercise. I don't really like the thought of cutting out beers!
Hope this helps.