Place all of the Script Directories (from the script extract) into the project "artifacts" directory. E.g. each in it's own folder, a direct copy from what you downloaded.
Copy the metadata file E.g. gallery_{GUID}.json file from your download and copy it over the top of the _data\scripts.json file.
For now we are only using the "userProject" array from the JSON object, you can choose to delete the other arraya/objects, if you like.
Execute the script in the scripts directory scripts\add-script-metadata.ps1
This will recurse through all of the directories under artifacts and find only those with a nested ps1 file
Adjust the filter if you have other types of scripts/files
You will need to modify this if you have more than 1 Script
There is a link to the Directory anyway, so multiple scripts can be viewed there anyway
The script will update the metadata in the data File to include the script path used to link to your scripts in github base repo directly
Update the _config.yml file with your GitHub Repo
The "sourcebaseurl" that points to which ever branch you are using for your scripts
The "url" which is the GitHubs Pages URL of your repo
Other contact info on that page, for your GitHub pages website.
I haven't tested other Themes, I tested only with: jekyll-theme-cayman