What exactly is the request here?
You cannot get stuff on Google Drive without an access link, and links cannot be "transformed" to evade the sharing settings.

If something is shared (viewable) via a public link, you can access everything, copy it to your own Drive, use a handy download link etc.

But you can't access anything that was not meant to be shared, if that was the implicated question here?

Sorry for not being clear in my initial request.

If I have a Google Drive link that is publicly shareable, gallery-dl currently cannot download it:

$ gallery-dl https://drive.google.com/file/d/1nxCfRCSQFjgDuc_jhlC24Y1Lrydg46zg/view
[gallery-dl][error] No suitable extractor found for 'https://drive.google.com/file/d/1nxCfRCSQFjgDuc_jhlC24Y1Lrydg46zg/view'
$ echo $?
64

Adding support for that would be fairly simple (the URL transform mentioned above).

Google Drive is too general for gallery-dl usage. I recommends: https://github.com/prasmussen/gdrive/ (required auth)

This sounds like youtube-dl, an optional tools to download video. I suggest to have gdrive as optional tool to download gallery from Google Drive. There are case when Danbooru's external source are from Google Drive, for example these ones:
https://safebooru.donmai.us/posts?tags=source%3Ahttps%3A%2F%2Fdrive.google.com*+status%3Aany

Sometimes fanbox and patreon only post preview images, and the full version is a link to Google Drive (or Dropbox, MEGA, etc.).
It is desirable to work with the extractor.fanbox.embeds option to complete the download with gallery-dl alone.