Hello,
I am not familiar with the Department of Defense Dependents Schools (DoDDS), but I was able to find some information on the programs they offer on the Education America site:
http://www.educationamerica.net/browse.phtml?sid=nn&eid=1076&a=eip "The range of special programs available in DoDDS includes special education, English as a Second Language, and Talented and Gifted."
As you can see they indicate that they do provide programs for gifted learners, therefore it would probably be a good idea to find a contact who is familiar with their GT program.