I've gained weight after both fat and gland removal. However I continue to go shirtless at the pool and wear thin t-shirts every day.
I've gained back some fat in my chest with an increase in weight, but absolutely no re-growth of glandular tissue. I look okay, but know from experience that when I lose weight, the fat in my chest will go away.
As long as that damn glandular tissue doesn't come back.....I'm a happy man.