Just curious, why did you close it?

I was going to pull request to my repository(fork this repository).
I made mistake.

I see. But the feature looks useful, so you can actually send a pull request.

The API is available vial google-api-client gem:
https://developers.google.com/sheets/quickstart/ruby
So I would prefer to use the gem (which we already use for Drive operations) rather than performing HTTP request directly, though.

OK!! thanks.
first, I tried using google-api-client.
but I couldn't be resolved session problem(I don't know how to share auth data(like accessToken)).
so I want to know how to share auth data between GoogleDrive-API and SheetsV4-API.

Here's code to construct DriveService instance with authorization object. I guess you can construct SheetsService here as well and pass the same authorization object:
https://github.com/gimite/google-drive-ruby/blob/master/lib/google_drive/api_client_fetcher.rb#L22

I could access!! thanks!
I'll try replace to google-api-client.