GIS is no longer an FAA certificated repair station.  Please contact Castleberry Instruments & Avionics for your instrument and avionics needs!  You can find them at

Experienced, trained technicians embody a dedicated focus to the customer expectations that is the key to GIS reliability and customer service. We have invested in updated technology and equipment to enable efficient operations. At GIS, we believe in fostering a family atmosphere to insure the shop runs as a team. This environment is reminiscent of what customers embraced in the aviation industry years ago.

Competitive prices, high-quality workmanship, quick turnaround time and service are our speciality. Here at GIS, our personnel have the ability to meet challenges that will exceed our customer’s expectations. That is why customers depend upon GIS’s full services, from testing, overhaul, and repairs to exchanges and outright sales. Try us, you’ll be glad you did!