Worked most all day on configuration of panel. Tried various inputs for ARINC and RS-232. Did not that I have pinouts and wiring diagrams for two different ways of wiring between GNX375 and G3X (GDU460).. I didn't confirm for sure which way I did it but pretty sure that I used page 109 from GNX375 install manual. Found I have to spin airplane to configure/calibrate the magnetometer. Still with issues of ARINC and RX-232 connections. Not sure what I did but red "x" on GPS is gone on system page on GDU460 config page. I have all green checks with yellow "!" for magnetometer since hasn't been calibrated.