My first attempt at creating an editor for the G2 resulted in a Windows only application. This one is located on a it’s own Sourceforge page. It also includes a VST which I made using Tobybear’s VST SDK for Delphi.
You can download just the applications or the full source code.
I have also put the source code up at github: BVerhue/nord_g2_editor
|NMG2 open soure editor||Windows application including a VST||0.26||Delphi XE2|
|NMG2 OS editor help||Help page for the editor|