It's absolutely possible, my DS being a prime example. Our small public school has bent over backwards to accomodate his education. Over the course of the day he is in grades K-5, depending on subject. He spends an hour a day with the gifted teacher in a one on one setting. This is the exact same school that refused to even consider early admission last year. So while it's not easy, don't give up hope.
If you can find someone in the school (in our case, the diagnostician)to advocate along side of you, it's amazing what can happen.