Ground Power unit

[NBL5370 4]

Would it be possible for PMDG to move the ground power unit back a bit as it is actually in the way of the stairs when loading or unloading on the 777F. Not sure about the passenger version as I always park at a jetway

 

[Olympic260 415]

You mean the dual Jetway plugs? If yes these are not meant to be used when using stairs.

As the F never parks in a jetway you must use the GPU (single GPU plug).

As for positions as far as I know the external vehicles/equipment positions are based on where Boeing recommends them to be based on their documentations.