This is very similar to what happened with our son. Hopefully, our experience may be helpful. Our son is also profoundly gifted and very sensitive (no vacuum cleaners, no tags on clothing, no Disneyland, etc.). We visited Annemarie Roeper (she is in Northern California) and she recommended part-time community college.
Our son, Evan, started community college part time at age 11 and was just admitted full time (he just turned 13). Going to college has relieved all of the issues he was having with noise, uncontrolled environments, kids who cannot control themselves, and intellectual challenge. Since starting college Evan has not had any stomach aches, moodiness, big upsets, or use of coping mechanisms. The school environment exacerbates SI issues. Moving to an adult environment such as college eliminates this environment and puts your son in control.
I would highly recommend community college for your son. Just start out part time and see how it goes. Since we started Evan has never missed a day, never been late, has a 4.0 GPA, and is taking Calculus, English Literature, Psychology, and Music Appreciation this semester.
In California, it is very easy to start community college and it is free. Just go to the nearest one and take the matriculation exams which will place him into the appropriate English and Math classes. Sign up for a class, and you will see that the professors and students are very accepting and encouraging. They treat our son as a peer in the classroom and as a little brother outside of class (they are very protective of him). This route works especially well for PG extroverts who like to participate in class discussion, give oral presentations, and meet new people, which it sounds like your son does.
Lastly, the academic rigor of the coursework works well for PGs because the course is taught to the syllabus, not watered down to the level of all of the students. For example, in Evan's precalculus class, half of the class dropped by the second month. Also, all of the classes are taught by people with a masters or Ph.D. in their field. As you must know, profoundly gifted kids ask questions which can only be answered by an expert. So again, this gives them what they need.
Good luck,
David
