This may be a bit off topic, but I feel like I had to throw in my $0.02 here.
I would be looking for a good elementary – high school (if you plan to stay here that long) school system in general – independent of a specific “gifted” program.
I went to school up in LA and was part of the GATE program. (GATE = Gifted and Talented Education) For my district, that meant little extras here and there but mainly just a GATE summer school program in elementary school. I elected NOT to enter the specific “gifted” class in a neighboring school because I wanted to graduate with my own peers.
First of all, your children need to be tested to ensure they are “gifted” by that school’s standards. Then you will choose to isolate them from the rest of their peers and impart upon them a feeling of competitiveness amongst the other “gifted” people. For me personally, that’s not worth it. I would rather have my children excel in the “normal” school environment and supplement their education with all of the “creative” projects which seems to be the cornerstone of my GATE experience. In the end, if the child is gifted and motivated, they will excel as long as the school system is set up to not corrupt.