gzip supports command line interface with `python -m gzip` like zipfile and tarfile but there is no help available from the command line which can be covered when issue23596 is merged that uses argparse along with tests for which are also lacking at the moment. There can be at least docs about command line arguments at https://docs.python.org/3/library/gzip.html. Currently there is no way to know how the command line interface works for gzip without looking at the source code.