From your post and previous answers, I find the following:
"Surgery is not an option"
"Gynecomastia is more common than most of us think"
"-- a GP -- sees it as a common condition and regards it as normal."
"I don't think I could afford surgery"
"I wouldn't recommend trying those testosterone boosters that supposedly remove gyne because they -- can -- damage your hormone system"
I personally recognize all of the above as wise advice. Your problem is that you are left with a decision to make. Your decision depends on just how much the gynecomastia really bothers you. If it bothers you a lot, then you may have to re-evaluate your financial priorities so you can save up for Surgery. If it is only a minor problem, you may simply ignore it or cope with it.
Do not make the mistake of self medicating. You have little chance of success. Conversely, You can really screw yourself up. The odds are against you.
Part with a little of your hard earned cash and see an Endocrinologist. It may help you decide which course to follow.
I wish you well,
Dan