I would encourage you to google Rosalind Wiseman and check out her books and website. This seems to me more of a mean girl issue rather than a gifted issue. I really like Wiseman's approach to explicitly teaching girls how to choose friends, and how to allow yourself to be treated. Sometimes gifted girls try to pretend they are not gifted in order fit in with what they perceive to be the popular group...maybe that has something to do with it. Wishing your dd the best.