Geotagged JPEGs, i.e. map files that have GPS data embedded in metadata, can be converted to Google's KMZ format with special utilities, such as Geotagged JPEG to KMZ converter or RoboGeo. This only works with pictures that have the GPS data in EXIF, not just any random pictures.
Open JPG file Open KMZ fileA small JPEG to KMZ converter
A software used to geocode pictures