How to edit markdown files on Google Drive on iOS and Mac

To edit Google Drive markdown files on iOS, there is a roundabout way to do it using iCloud drive. You can't just use an iOS text editor like Runestone because they can't edit and save directly to Google Drive. What I did was make a folder (called "Obsidian") in iCloud drive on my Mac. Then on my Mac, I pointed Google Drive at that folder to sync it with Google Drive. Now my Mac is syncing the folder to iCloud drive and Google Drive.

Now I can use Runestone, Obsidian, or my iOS text editor of choice on those files. And it is on Google Drive so I can use Google Gemini AI to query those files as well. I can edit the files on my Mac using Obsidian or any Mac text editor.