Lee
Is it a bird? Is it a plane? No it's Supermod!
Because Gordon can have a kid that's not a part of the Bat Family. I know that the does become Batgirl in the comic books and everything derrived from them but that doesn't mean that she is in the Nolanverse. she could be used simply to add something to add to his character. Also, according to Wikipedia Barbara Gordon was Commissioner Gordon's wife in the The Dark Knight. He did have a daughter, but she wasn't named.
*yawn* again remix? This is getting tedious.
Comics wise (post crisis) Gordon has a wife: Barbra and has two children: James Gordon and Barbra Gordon. Only a fool will say that the daughter in the film was not Barbra, why even have her in there if not for a little nod? Robin is the same age as her so logic would say Robin's very much alive and well in the Nolanverse.
At what point did I say she would be Batgirl? I didn't I was using it to point out that somewhere in Nolanverse Dick Grayson's in a circus act with his parents.