Hey all, informational: I was getting crashes when flying the PMDG 737 and 777 (and no other aircraft) in Prepar3D v3 (faulting module panels.dll). After some mucking around I was able to fix it by disabling the Flight1tech GPS drivers (for the GTN 750 and/or G1000) in the dll.xml file. Looks like those of us who want to fly big iron and also do real-world GPS training need to modify our dll.xml file prior to each flight depending on which we want to do.

Have you used the GTN installer to install the GTN specifically into any PMDG planes? It shouldn't represent a conflict to have both on the same system.