I think that there is a fair amount of overlap in some bipolar characteristics and those common in HG kids. I am glad you are finding more ways to move forward. That artcile Wyatt linked above is one of the list I mentioned.

You could still look at a book such as the Bipolar Child (Papolos). Knowing more about bipolar and HG kids might help you navigate these issues with the therapists better. For Anger issues, many people find the Explosive Child book approach useful.