If she checks out well medically, as we hope, then have an open discussion with your little girl about any school issues. What does she think about the special work in reading and spelling? Does she want to pick her own books, is it too hard, too easy? Is she being teased by peers for being too smart or the teacher's pet? (Unfortunately it still happens!) If the problem continues, I would consider having an educational evaluation. That would give you an IQ potential, as well as a clear idea of her strengths and possible academic weaknesses to help you plan a challenging education for her.
Have you seen the book Children With Tourette Syndrome: A Parent's Guide, edited by Tracy Haerle (Woodbine House Press)? I have found it to be very informative to me in my periodic clinic work with children with this diagnosis. I hope you find this information helpful.