A new walk through has been published by WP Beginner, stepping through the process of integrating Gravity Forms with a Google Docs spreadsheet:
How To Integrate Gravity Forms With Everything Using Zaper
This is a really detailed walk through. The Gravity Forms extensions uses the same webhook integration method that the WooCommerce extensions uses, so the whole process is very similar.
Now, just need to find some time to produce some nice video walk throughs for some of the WooCommerce integrations.