There are great articles about advocacy and choosing a school. Here is one example from the Davidson database: http://www.davidsongifted.org/db/Articles_id_10511.aspx

Other than the meeting, do you have the opportunity to visit the school? Has your child shadowed? Have you read the policy/practice statements for the school (often found on the school website)? What does the formal G&T program consist of (once a week 30-minute pull out... teaching capped at grade level ahead... or matching the curriculum/pacing to the child?) Does the school have students with a similar intellectual profile to your child? Do the teachers have prior experience with children with similar intellectual profiles? Can you meet the parents of children with similar intellectual profiles?

Chapter 14 of the book A Parent's Guide to Gifted Children discusses Finding a Good Educational Fit. Included is a Table of Questions more important than "Is my child in a gifted program?", by Dr. Donald Treffinger.