Sounds a lot like Mr W.
A couple of relatives have said that he should not be reading at 23 mos, but they have come around. He can certainly shock strangers.
We are taking things one day at a time with him and letting him tell us if he is happy or not. We recently moved him from an in-home daycare to a Montessori program and he is enjoying it. I imagine that by this summer he may get bored. We'll cross that river when we get to it.
I would suggest you look up Dr Ruf's book and read through it. She classifies the children into groups and then offers solutions for them that she has seen.
As far as options go, we have more options than a lot of people do - here in Texas. There is an outstanding gifted program for younger kids in the local schools where they group kids together and move them through the curriculum at an appropriate pace. We also have two excellent private schools that have mostly GT kids in them.
Another option is a tutor and HS, although Mr W is very outgoing and enjoys interacting with all kinds of people.
