Wondering what a white GSD looks like? They look just like colored GSDs.
Consider this: Her mother is a American Kennel Club and Canadian Kennel Club Champion black and tan. Her father is a black and tan grandson of AOE Select Ex. Ch. Kismet's Sight For Sore Eyes, HSCS, ROM, TC, HIC "Dallas". How could this dog possibly be anything but a German Shepherd?
Other pictures of white German Shepherds: