Ahh... I appreciate the clarification- maybe not bullied and excluded, so much as introverted? I can appreciate being an introverted, dreamy kid- I was one myself.
I think you just have to gauge whether she seems happy or of there is some lagging skill that is holding her back from friendships.
With your DD, being both introverted and gifted, it's likely that she finds her own thoughts more fascinating than what is going on at recess. She may have a low tolerance for exhausting personalities and playground politics, so opts out. She may decide she wants more friends and will need to change her habits- but if it were me I would eat her discover that on her own. She'll make friends when it becomes important to her- and you can support her with how to go about it.
