Generally, stay hypothetical and ask questions about what they do with advanced kids. And listen carefully to find out if they believe in GT, or that everyone is equal, or that everyone evens out, etc.

Find out what programs they have and what the criteria is. Do they have early admission?

When asked specific questions, speak of your child's drive or love for this or that.

Here are some old threads that might be of value as you look for the future:

http://giftedissues.davidsongifted.org/BB/ubbthreads.php/topics/30387/1.html
http://giftedissues.davidsongifted....rst_contact_with_school_s.html#Post48945
http://giftedissues.davidsongifted.org/BB/ubbthreads.php/topics/125076/1.html
http://giftedissues.davidsongifted.org/BB/ubbthreads.php/topics/51078/1.html
http://giftedissues.davidsongifted....rue/Re_School_Frustration.html#Post44832