Originally Posted by aeh
The UW has more than one track for early college entrance, one of which is aimed at entry after 10th grade. Doesn't include a high school diploma, though. That program does appear to accept some out-of-state applicants--at corresponding out-of-state tuition, though, for the first two years of college.

Several states have widespread early college programs, with several years history, for this target group. Here's one version: http://www.jff.org/initiatives/early-college-designs/schools
Those programs are not designed for gifted children:

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Combining high school and college in a rigorous, supportive environment that enables struggling students to graduate with college credit and the tools for postsecondary success.