My DD9 was just accepted into the DYS program this spring. She also has ADHD and anxiety issues. Instead of a big write-up, the doctor who works with her just hand-wrote a quick note on clinic stationery that said yes, I am treating her for ADHD and anxiety and she is doing OK.
I also wasn't very comfortable with her classroom teacher for this year, but asked her GT teacher from last year to write a recommendation. My second recommendation was from her piano teacher.
Good luck with the application! I know it's stressful, but worth the effort.
