A family of Microsoft word processing software products for creating web, email, and print documents.
I was having the same problem and the only way I found around it was to save the doc to iCloud first. Then go to Google Drive and upload the doc from iCloud and you now have access to it on GD.
Thanks for this.
I've had zero problems opening Microsoft Office iOS files from inside of Google Drive.
But... Saving them to Google Drive was no bueno. The resulting files were always empty.
However, saving them to iCloud Drive first and then copying them to Google Drive works good enough as a workaround.