I call it sex reassignment surgery. It seems like the most correct term. I also use genital reassignment surgery, but not as often. I've always seen "SRS", and a lot of people seem to see "GRS" and think gender reassignment surgery, which just sounds grossly offensive to me. o__o;
Gender Corrective Surgery sounds like a more dangerous version of "cure"-therapy.
Never heard genital corrective surgery, but it sounds alright.
Still prefer SRS as it seems to be the most commonly understood.