It's right there, encoded in the (avchd) video stream. This program will make it available for you.
The package contains a program to extract time, date and position information from the video, creating a subtitle file of "srt" format. Many media players will be able to display the information while playing your video, and many video processing packages will be able to process it. See below for a screenshot:
Not only will it extract the position information (if you have GPS on your camera), but it will also translate it to an address!