I have written a bit of a tutorial on how I replaced the default MG2 EXIF parser with the EXIF library built into PHP. The reason I did this was that the default parser does not recognize GPS EXIF data and I wanted to link my photos to the location in which they were taken. Also, the default parser does not recognize camera specific EXIF data, such as the ISO speed, and now it can, though I don’t yet access all the data that is available.
See it in action in My Gallery
See the Step by Step Tutorial Page