Well to the viewer, you can't tell if the picture has exif data in it or not, unless you have a exif reader. If you have a reader, a menu option will be available to view data, and the GPS info will be on there, just in the form of Lat and Long. The program I have, is a plugin for firefox and it's easy becuase it even provides a link directly to google maps, yahoo maps, etc!!
Here's an attachment of the non then stripped file what it looks like; Take note of the GPS coords.