J.D.
All parents think their kids are highly gifted. What does that sort of labeling mean? Gifted at music, math. How did you arrive at this conclusion? Perhaps your child is, at this age who knows, and any test she took would quite unclear - she's just too young. I'd be less worried about looking for a program for highly gifted toddlers, and more worried about finding her a program that is going to maximize her socialization.
BTW, I know what I'm talking about - I have a 10 year old who has a 153 IQ, the best thing I think I did was teach her how to deal with her peers and understand that not all people are going to get things like she does. It is more important that kids develop compassion, kindness and respect than anything else. If she's really that smart it will all fall into place. I doubt Bill Gates went to a highly gifted preschool, you know what I mean? Good luck with it all.