You don't need to know about GG specifically to know if fins will grow back. Yes they will grow back if the base of the spines is still there the fins will grow back. Most times they grow back perfectly sometime a little deformed if the fins are constantly re-injured over and over. But my opinion on these two they will grow back perfectly if the fins are no longer being chewed on.Looks like nobody knows anything about gourami's even though this is a 404 page thread. I decided not to buy them for lack of information.