This is a bit off-topic but related.
A dear friend of mine works in a good public school system as an administrator of a high school. She manages the special education for the school and says the parents of these kids know their rights and fight for their kids. Every e:mail that asks a question ends with something like "I look forward to hearing from you by close of business on Tuesday." Every letter request has a deadline, every meeting with the school is accompanied by an attorney. My friend applauds these parents because they are the ones who get what they need for their kids. She commented to me once that until the families of gifted children use these tactics, a school may never get serious about your child's needs. It's hard for the schools to differentiate, but they still need to do it! Typically the schools that are good at it had a family pave the way some time before.
I applaud your tenacity. What you do now will also help future gifted children in your school. Keep it up!