Hi Derek, Sabrina from the Product Team here - thanks for submitting this request! Unfortunately, we do not currently have this planned. That said, have you looked into using a cloud function to pull your Google Spanner data? Check out the Google Spanner API documentation here. In the meantime, we will continue to collect customer demand to justify the commitment to support & maintain a high-quality Fivetran connector. Every upvote on this request increases the case to build it.

Best, 

Sabrina Porter
Product Intern