I just focus on making sure that she keeps feeling good about herself.
This is key.
Being Me is a book about understanding, building, and maintain confidence. It is by Magination Press, American Psychological Association. It is not specifically about gifted kids, but does a nice job explaining personal confidence and social confidence in a way kids can understand. Parents may wish to read the book first, to see whether it is applicable in their own child's circumstances. Reading also helps a parent prepare to have meaningful conversations with the child on different aspects of the topic of confidence.