I'm currently doing this so I can stop paying Zapier. I've built a plugin to append new Gravity Forms entries in WordPress to a Google Sheet & with some more polish it'll be ready to sell.
If you've got a forms application that can't export the data where you want it to, I can't shake the feeling that you're working on the wrong part of the problem.
The word standard is doing a lot of heavy lifting in that sentence. I don't want to re-build Gravity Form's conditional logic or feeds to PayPal & HubSpot systems, so I'm not going to.