No, that should be just fine.
My advice to you is to find a breeder. I think you will find most LFS stock to be as short-lived and disappointing as many of the rest of us. LOL. If you have an aquarium club in your area, that would be a great place to start. Otherwise I would recommend Aquabid. Most of the GBRs you will find at the LFS are just really poor stock.
Sounds fine to me. GBR's are kind of hit or miss though. Seems as if a lot of them are pretty weak. But they are beautiful fish. I'd like to get a pair myself.
EDIT: ^She beat me
One is fine.
Glo fish are really active, they may stress a calmer fish like a ram. I have not kept them together so that is just a guess.