Mass Virtual Academy at Greenfield (MAVA -
http://www.k12.com/mava/home#.UbIDYBzXRCc) was the first and only public virtual charter school for MA . It's run by k12. I met a mother who was homeschooling her kids and using it this year. I don't think they're gifted though.
This year, however, MA legislature voted against MVA and it is slated to close this year (http://www.bostonglobe.com/metro/2013/03/04/first-and-only-virtual-school-massachusetts-close/fYQeUeLv2cA15Ts9snYW8J/story.html;
http://necir-bu.org/investigations/ma-virtual-academy-lags/). There was a lot of opposition to the lack of oversight over it as well as the private corporation taking a lot public money without being overly effective.
I was going to consider MAVA for next year for 2e/pg ds7, but will have to go to the drawing board and come up with something else. We don't have the money to pay privately so that's not an option. Public schools are out. 2e expert said don't even consider the public schools; we'd get nothing. Sigh.
Take heart. There are many ways to educate a child on the cheap and without going through these private programs. It's not easy, but it is possible and perhaps more enjoyable/rewarding too.