Hi,
Although not tested much, here is a configuration for the RXP GNS530W/430W for the Mu-2 GNS version. I've elected to connect fuel-flow and air-data to the 530, although I've not yet flight tested these. There's no auto-slew or OBS course-in as I couldn't get them to work. In addition, the GPSs are wired up to _replace_ the VOR signals when set to CDI mode. In lieu of some replumbing in the Mu-2 itself, I think this is the best I can do, but I'd be very happy to be corrected.
At the very least, this gives you some starting coordinates for the panel rendering, which was a little tedious to calculate!
DavidRealityXP.GNS.ini