Hi Terry,

It looks like GitHub indeed does not offer downloads of generated sites.

You can try to use web archiving tools (like wget) to get all content from the generated website, or generate the HTML from a local repository using Jekyll.
I'm sure you found https://help.github.com/articles/setting-up-your-github-pages-site-locally-with-jekyll which has instructions for Mac, Windows and Linux.

I hope this still helps a little!

Regards,

Ben

Ben Companjen
Digital Scholarship Librarian
Centre for Digital Scholarship, UBL
Universiteit Leiden
 
Witte Singel 26/27, kamer 025
Postbus 9500
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