iPhoto for iOS Not Using Google Maps
It appears that Apple chose not to use Google Maps in iPhoto for iOS, as noticed by 512 Pixels.
Apple has purchased two companies with mapping technology, Placebase and C3, in the past few years. However, it's not at all clear where Apple got the map tiles, whether this is an internal technology or if they were licensed from some other source.
Apple does use Google Maps in the Mac version of iPhoto.