There is a fork KaySchneider/ghost-google-cloud-storage which is more recently updated, perhaps the maintainer would be willing to make this the "official" one?
Either way, the link to the unmaintained adapter should be removed or marked as obsolete.
The GCS adapter thombuchi/ghost-google-cloud-storage is unmaintained and apparently does not work with the latest Ghost version.
There is a fork KaySchneider/ghost-google-cloud-storage which is more recently updated, perhaps the maintainer would be willing to make this the "official" one?
Either way, the link to the unmaintained adapter should be removed or marked as obsolete.