I have to say, You have done a good job. I am a mother of a 15 year old gifted son and like you the school wanted to have him graduate when he was 12. I moved schools. I found a good school that would work with his needs. I am a parent first then a teacher. I know the in's and out's of gifted. I know that they are taught at a different level. And they need to be. My son plays football and wrestles but doesn't really hang out with those kids. Instead he would rather go build a rocket then chat about the latest dance. I work with gifted children at the Mid-High I work at and I know that I have to challenge them to get done what they need so that they can be productive in life.
So give you self a pat on the back. Just remember she is still a child, but a child who thinks like no other.
Wendy