The exact wording I got from the district GT coordinator at the time we gave her the evaluation data for dd#1 was "highly gifted students don't last long in the public school system. Have you considered homeschooling?" and "the higher ups are philosophically opposed to meeting the needs of children like your daughter." I totally empathize with the responses you are getting.
We left that district the following year, but are back there now with surprisingly better results. A new superintendent, a new GT coordinator for the district, and a GT coordinator at the middle school who suggested the grade skip to us has made a world of difference.
Do you have other schooling options other than homeschooling?