AllieOop,
I have to agree with DeeDee here. It is entirely possible to be highly or even profoundly gifted and still have ADHD, AS, sensory integration dysfunction, processing disorders, or other issues that you are better off finding out about early on when intervention is easier and more effective.

This link lists some of the most well-known evaluators for highly gifted children. Most of them are also knowledgeable and helpful for sorting out '2-E' issues, where giftedness co-exists with some sort of deficit or challenge.

You may really want to get a copy of James Webb's "Misdiagnosis and Dual Diagnosis of Gifted Children and Adults", which does a great job of helping parents and professionals differentiate between gifted traits and other issues, so that parents, teachers, and medical professionals can act appropriately to help. Brock and Fernette Eide's work is also well worth reading.