Submissive urination is not breed specific, although it can be connected to BAD breeding of any breed. GRs should be outgoing and confident and dogs who are fearful and overly submissive should not be bred.
This is NOT a housetraining problem and a dog should never be corrected or scolded for it, as this is something they have no control over.
Here's a bunch of links on how to handle this problem:
Submissive urination