No, German shepherds will not turn on their owners. German shepherds are very loyal and obedient pets.
German shepherds will bond with you and your family very quickly through patient and positive training. Once German shepherds have formed strong bonds with you, they will always be protective and devoted to you and your family.
German shepherds will not turn on their owners unless their owners become aggressive with them. Whenever German shepherds are fearful or anxious, they will become hostile and feel the need to protect themselves.
Therefore, unless you are abusive towards your German shepherd, they will not turn on you.