This package will download all gist files to directories named after gist description.
Run [sudo] npm install gist-backup --global
gist-backup <github-username> <github-password> <http://enterprise-URL or https://api.github.com> <path/to/backups>
or just
gist-backup (will be prompted for username, password and local path to backup directory)
If all went well, you'll see "gists" directory populated with directories named after gist description. Gists with similar descriptions will be appended with 'duplicate N' (where N is an incremented number), gists without description will simply be called 'Untitled'.