Most of my Gauges are developed specifically for specific aircraft in order to achieve the best matches in terms of designs, features, specifications and operation responsiveness.
Surely there are certain kinds of Gauges, such as Attitude Indicators, Directional Gyros, VORs, ADFs, etc, which are less unique to general aircraft, and they may still be operational on a number of different aircraft.
But as said, there will be differences (either subtle or significant) in terms of designs, features, specifications and operation responses while using the Gauges on aircraft they are not developed for.
For those Gauges that are identical and fully operable on more than one aircraft, such as the Wet Compass under FSX/P3D Cessna Shared, I will have the appropriate aircraft models listed with it.
Feel free to contact me if you have questions.