All headlights fit all years, the OEM lights and most of the harness on the 2012+ GL1800/F6B are actually made in China these guys most likely have access to the molds, its a little late to steer away form stuff made in China if you have a 2012+ bike
Look for yourself next time you have the seat off take a look on the large white label on the wiring harness from the crossbar towards the right rear