Yes, you can get gyno after getting gyno surgery. I am not sure how likely, but it is a possibility.
Also winny if anything should help you with the gyno. Do a search for something like 'gyno reduction cycle'. I can't remember but it's something like .25mg/arimidex/day for a month, 30mg/winny for 4-6 weeks. Anyways, several people have had good results from it.
Also, it helps to know how you got the gyno, adolescence, progesterone, estrogen, etc.
If you think it may be prolactin, taking vitex (chaste berry) is a good idea. Fukkenshredded used that after getting gyno and he said that now the gyno has been eliminated.
Unless you got this during adolescence, I would explore every alternative to surgery first. Going under the knife is always a risk.
Good luck. Gyno can come to the most careful user.