No, the GP-1 GPS unit is not compatible with the D80.

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Answer Title: USB Driver for GP-1 for Windows
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No, the GP-1 GPS unit is not compatible with the D60.

The GPS information is recorded in the metadata of each picture. Get in contact with MAC to see if this options is available in iPhoto.

GPS devices detect these signals and use them to triangulate their position, heading, speed, altitude and other information. This location information can be embedded in an image to show the photographer where the camera was when the photo was taken. This positioning information in a photo is useful for sorting and cataloging images. Just remember that the GPS information recorded is representative of where the camera is located, and not necessarily where the subject is located. The focal length of the lens may contribute to a difference in accuracy.

GPS devices detect these signals and use them to triangulate their position, heading, speed, altitude and other information. This location information can be embedded in an image to show the photographer where the camera was when the photo was taken. This positioning information in a photo is useful for sorting and cataloging images. Just remember that the GPS information recorded is representative of where the camera is located, and not necessarily where the subject is located. The focal length of the lens may contribute to a difference in accuracy.

The GP-1 GPS unit is not equipped with a battery or on/off switch: power is supplied from the camera. The GP-1 turns off only when the cable connecting it to the camera is disconnected, please verify that is properly connected.

The GP-1 GPS unit use the GP1-CA10 for connection to the 10-pin remote terminal of supported cameras, or the GP1-CA90 for connection to the D90.

By clicking YES you will synchronize the camera clock with the time reported by the GPS device (information received from the satellite with the Universal time, depending on the camera location).

The GP-1 GPS unit and compatible release cables utilize the Ten-pin remote terminal (can't use both at the same time).

GPS tracking typically requires an initial startup period to acquire satellites. This period may vary depending on available satellites and atmospheric conditions. If you experience a connection problem initially, do not move the GPS device for up to 20 minutes under a clear sky to establish connection (may take longer if cloudy). If the device is new or has been moved since last acquisition, it may require time to re-establish connection. Once acquired, subsequent acquisitions should be faster. If the unit has been moved a great distance ( several hundred miles or more ), then re-acquisition of the GPS signal will of course be necessary.