How do I import a Google Sheet?

The simplest way would be to first download an Excel or CSV version of the Google sheet and import it manually

If you would like to do a periodic import, you can find the CSV feed URL of the sheet in this format:

https://docs.google.com/spreadsheets/d/DOCID/export?format=csv

Remember to replace DOCID with the actual document id, which you can find on the URL of your Google Sheet.