Hello,
ibritogu. I agree with what others have written above. The longer the paper trail leading up to your diagnosis, the more reasonable you will likely find GMAC™ to be in providing accommodations. There are different levels of accommodations as well, and GMAC™ uses its own criteria to decide who gets which ones. For example, I worked with one student who requested double time, since, according to a medical evaluation he had received while enlisted, his processing speed was below the 15th percentile. GMAC™ granted only time and a half, perhaps because on that same evaluation form (which the student shared with me of his own accord), all the other percentiles were pretty high, including the more controversial general intelligence measure.
Be prepared to supply as much evidence as you can about how your condition may have affected your academic or test performance in the past. Such information, combined with the professional diagnosis, will present the most compelling case.
Good luck.
- Andrew