That's just a Graphtec Ghost system. For a closer look, I'll just whip out my hand dandy chart....Can you decode what's going on with the bonus electronics? That is FABULOUS. I also like the black saddles. Tastefully played.
The MIDI goes to a 13 pin connector along with everything else. Magnetic and Acoustic signal also go through a smart jack which can be played mono with everything mixed together or stereo with the magnetic going to one side and the acoustic to the other. In other words, it can be hooked up in any configuration the user desires. The MIDI controls were also laid out to be in positions similar to a GK pick up, so that there would be minimum confusion switching to and from GK equipped guitars.