Furthermore, I think the addition of an on-board logic-level converter will help us to connect the GPS module to 5-V devices as well as 3.3-V devices. It’s worth remembering that a GPS receiver must ...

Put simply, the only GPS add-on with Nikon's name on it is universally seen as a poor purchasing decision. For one, it's still right around $200... despite the fact that it's pushing four years old.