It is my understanding that for purposes of applying to the Young Scholars program , the GAI is to be calculated by the professional(s) who tested your child, and the complete report is to be submitted for the application, not just the scores.

If your child does not become a DYS, there is still much support available from DITD in the form of information on the Davidson Database, summer courses, this public forum, the Educator's Guild, and the Davidson Fellowship.

I am starting to run out of options
Whether your child becomes a DYS or not, you may wish to visit the Davidson Database and search for "schooling options". There are many articles on this topic, one or more of which may give you some ideas for working with your school or creating a unique educational path for your child.