Cecil, Hybrid Bream are not the same cross as Georgia Giants, Bob Lusk agrees with that. I would not put the common hybrid bream cross in my pond.
I'm not so sure Bill although Bob would know better than I would. I was told by a biologist at another southern hatchery that when said party runs out of GG's he buys hybrids from them and sells them as GG's. So either they are the same or said party only cares about a sale.