d.gh0.pw was a precursor to the modern Documentation system. It was a DokuWiki installation hosted by ubq323 on which the GTech Procedures Manual was hosted. Due to a mysterious incident, it was shut down around 2024-04-04. Its relevant data was semimanually migrated into a TiddlyWiki instance which was then semimanually migrated into the Documentation due to the unpleasantness of using TiddlyWiki and its bad SEO.
It's already far too late.