I can share an anecdote to illustrate the impact ADHD can have on testing: My son's FSIQ before ADHD dx was 68th percentile, after ADHD treatment it was 98th percentile, and the GAI, an IQ calculation that doesn't rely so strong on the subtests impacted by ADHD symptoms was approximately 99.6th percentile. The evaluator said would have scored even higher except he was too slow, answering correctly outside of the scorable time limit.
Before ADHD dx and treatment, the elementary school could not see the ADHD or the degree of acceleration needed. I was told he was "normal" and "typical".
After ADHD treatment, he is radically accelerated, homeschooled, doing college prep. Had he stayed in elementary school he'd be in 4th grade.
I would suggest pursuing private neuropsychology evaluation. That will give a much better idea of her aptitude and how much her ADHD is affecting her output.
