I've wondered this too. 3DR support told me it is called a "6-pin Adapter, Molex Clik-mate."
MRobotics has a couple that might work, but I don't know for sure.
mRo GPS adapter - Molex CLIK-Mate to DF13 6-Pins
mRo GPS adapter - Molex CLIK-Mate to JST-GH 6-Pins
Can anyone confirm that one of...