Crate training can be a useful tool for house training a German Shepherd Dog, as well as providing a safe and comfortable place for the dog to rest when you are not home. Here are some steps you can follow to crate train your German Shepherd Dog:

1. Choose the right crate: The crate should be large enough for the dog to stand up, turn around, and lie down comfortably.
2. Introduce the crate gradually: Place the crate in a room where the dog spends a lot of time and leave the door open. Encourage the dog to go into the crate by tossing treats inside and praising the dog when it goes in.
3. Begin closing the door: Once the dog is comfortable going into the crate, begin closing the door for short periods of time while you are home. Gradually increase the length of time that the door is closed.
4. Leave the dog in the crate: When you are home, leave the dog in the crate for short periods of time while you are in another room. Gradually increase the length of time that the dog is left alone in the crate.
5. Crate the dog at night: When you are ready to leave the dog alone in the crate overnight, place the crate in a quiet area of your home and follow the same routine as you would during the day.

Remember to always praise the dog when it goes into the crate, and never use the crate as punishment. The crate should be a positive and safe place for the dog.