the area of Iowa?
I was asked on a Siamese cat board if I know of any - since I live in NH I can't say I'm familar with any GSD rescue groups in the midwest.
I did a google search and found 2 in Illinois and 2 in Wisconsin (can't believe I had to pull up a map of the US to know neighboring states)
the person that asked me has a friend that needs to give up her 2 year old male GSD. Apparently the dog has been through several homes and losing yet another. 2 years old - what a shame.