Steampipe [1] is an open source Postgres Foreign Data Wrapper with 73 plugins [2] including Google Sheets support [3]. A lot of our users use it to connect custom metadata with other systems - e.g. join ownership info in Google Sheets with tags on AWS resources. Notes: I'm a lead on the project, it's focused on read only.

1 - https://steampipe.io 2 - https://hub.steampipe.io/plugins 3 - https://hub.steampipe.io/plugins/turbot/googlesheets