Yes, I ordered the manual and the school already had the forms. Skipping dd a grade was suggested by the school, so I'd say that convincing us as the parents was more the challenge than convincing the school in our instance, though.
My dd has a fall bd, so she was one of the youngest already as well. She skipped 5th grade so she is now an 11 y/o 7th grader and doing well.
I'd say that we've found GT coordinators and school administrators in general to be familiar with the IAS but teachers who don't routinely work with GT populations may not be as familiar with it.
