Just picked up a GX-60 unit minus the tray and was wondering if the old II Morrow trays will work or a GX-50 tray for that matter. Any info would be appreciated.
 
The GX-50 does not have the 15-pin comm interface connector that the GX-60 has.

The GX-65 has a both a 15-pin comm interface and a 37-pin navigation interface connector, like the GX-60.

So a GX-65 tray should work. A GX-50 tray may work if it has a punchout for the 15-pin connector... don't know.

--Paul