To complete installation of the Garmin G5 in a certified aircraft you must validate the new Garmin G5 on this page. Upon validation you will receive the required STC Approval Letter specific to this installation. Please enter the code that appears on the card provided with your Certified G5. The card with your code is shown below:
After completing the STC approval process and registering your product for warranty, you will have access to view authorized content on the Support Center, such as Installation Manuals, Software, Service Installation Bulletins, and Service Communiques. See this FAQ for more details: How do I access installation documents and software for my certified avionics that were purchased over-the-counter?