Each country is split into regions, and each region has a manager who you can contact for more information. All the contact details are linked below. Also below are pictures of three of the best known instructors in GKR Karate - Kancho Robert Sullivan (founder and chief instructor), Shihan Stacey Karetsian (assistant chief instuctor and executive vice president) and Sensei Gavin Samin (international vice president).
http://www.gkrkarate.com/index37.php?x=TRAINING-LOCATIONS~|^`1A
http://www.gkrkarate.com/index37.php?x=TRAINING-LOCATIONS~|^`1A