No, haven't seen that one; I think the copies of questions are usually kept pretty tightly. From googling quickly, it sounds like GADs is an assessment questionnaire for parents, teachers, etc., for aspergers/autism spectrum.
I am posting because this sounded like basc II, if I am remembering the acronym correctly, one of the assessments done for my son. There were a ton of questions (it seemed to me) and you had to consider the last several months, and you had to mark whether behaviors were never/seldom/regular/frequent, or some similar combo. It was really hard I thought to make these choices. Are you considering having an assessment for a dc, or curious about one that has already been completed?