We've worried about this also. I have no real concrete advice, everyone else has way more experience than us! But our pediatrician has also mentioned this to us at our last appointment (basically that we should start looking into alternative schooling methods because we're most likely not going to be able to send her to the local public school, which happen to be really bad!).

Although... we're expecting a big move soon (and there's a VERY good chance we'll be living in a country where homeschooling is illegal), so that's another concern. Right now we're thinking something like Montessori/free school and we'll just look at what options are available if/when we move and how well they deal with gifted kids. Oh, and if we can afford them too... But it's so hard dealing with the uncertainty of it all.