Image::ExifTool will deal with the meta info for GeoTiff (by loading Image::ExifTool::GeoTiff), but it's meant only for meta info and not to display the images.

Searching CPAN for "GeofTiff" doesn't turn up anything about displaying them, but as I understand it GeoTiff images are essentially TIFF6 with some extensions, most of which are meta info extensions. I'm not sure how well regular TIFF software will deal with any of that.

There is a full spec, API reference, and source code for libgeotiff at http://www.remotesensing.org/geotiff/geotiff.html which may help you implement something to deal with the format.