Welcome to the forums KLD. aeh gave you great advice, and I don't have anything to add re MGH (I am not familiar with them specifically). The one thing I would add, as the parent of two 2e children: I wouldn't overthink or worry specifically about finding an evaluator who specializes in gifted children. We don't have gifted specialists in our area, but we did get the information we needed re giftedness from our children's neuropsych evals, and equally, if not more importantly, we got detailed information on their challenges, a plan for the path forward re how to accommodate and remediate, and recommendations for the follow-up therapies etc that ultimately, once followed, made it possible for my 2e kiddos to reach their potential and participate in gifted programs etc.
The absolutely most valuable thing coming out of our choice of a neuropsych was *local* - because the psych was familiar with local schools, local OTs/SLPs/etc and could make good solid recommendations of what to follow up with school vs what to seek out privately and through which practice etc. We also found it useful having a local neuropsych when we needed to have a follow-up for our ds when he entered middle school.
I'm not sure we would have gained anything by specifically seeking out a gifted specialist. I realize that may not match other people's experience on these forums, but I would consider looking at your concern from inside-out. While a psych who specializes in evaluating gifted children would have the edge in terms of experience in evaluating a larger # of gifted children, they might not have a wide experience in evaluating children with special needs such as Tourette's. Realistically, when our 2e kids are young, we need the most help with how to address the 2nd e, and that's where going with a local children's hospital or local expert can really be beneficial.
Best wishes,
polarbear
