No, not really.
Well - OK, there might be a way, but know that we don't know if it'll work, and we can't provide technical support for these products, and, and, etc, etc.
But there do exist bluetooth to serial converters like
this that could possibly work, provided that the GPS itself outputs the type of sentences that the Dynon needs (see this http://wiki.dynonavionics.com/GPS_Serial_Compatibility_and_Configuration_Settings), and provided that whatever power voltage input that the device needs can be found somewhere in the aircraft. Now, all that said, on the other hand, the EFIS-D100's HSI needs a mapping device, like an aviation handheld with a screen, to actually show you anything on the HSI. Without destination and CDI information, you'd basically only get winds winds aloft on your D100.
