Contary to the repo name, this actually implements gunzip and not gzip in Julia.
The coolest thing (that I know of) that you can do with this repository is visualize unzipping.
To play with this, do
git checkout visualization
gzip myfile.txt
julia gunzip.jl myfile.txt.gz
This will unzip myfile.txt.gz and show which parts are represented literally and which parts are references to previous parts of the file. Do this to a text file and not a binary :)
You can see a video of this happening to "The Raven" in this blog post.
If (when!) you find bugs, let me know!