GI20Editor is a software editor for the Roland GI-20 GK-MIDI guitar interface.

It can receive a MIDI "bulk dump" containing all the current settings from the device, display and modify any parameter and finally send data back to the unit.

It can save a dump to a file and reload it, thus allowing backups.

It can also function as a MIDI repeater, to drive a hardware synthesizer connected to your computer but not directly to the GI-20.

Finally, it has a small MIDI implementation with which you can control its behaviour.