.GAU File Extension
File TypeFlight Simulator Gauge File
What is a GAU file?
Aircraft gauge used by Microsoft Flight Simulator; includes altimeters, GPS displays, weather radars, radio stacks, etc; can be imported and used with various airplanes.
Gauge files must be stored in the C:\Program Files\Microsoft Games\FS200x\Gauges folder to be accessible by the program. Custom gauges can be created with custom photos or artwork and C++ programming.