The connector/pinout information may be applied to the Garmin model GPS II
There is one pinout found for Garmin GPS II .
The pinout (pin-out) is a cross-reference between the contacts (pins) of an electrical connector and their functions. The pin assignment diagram is listed below. Click for details
Garmin GPS 45, 12 XL, GPS II, III, V, 72, 76, 92, 176, 176c, 196, 295, StreetPilot III (round connector) pinout