According to Gravity Forms Documentation a Legacy version of PayPal Payment's Pro Exists.
Below is the link to Gravity Form's Documentation:
Legacy PayPal Pro Add On Gravity Forms
This add on was not created by PayPal, it was created by Gravity Forms.
There is also a version of legacy PayPal Pro account that has Payflow API Credentials Available. If you have that version, here are the steps to obtaining Payflow API Credentials:
Log into your PayPal Account
Click on Tools
Click on All Tools
Click on API Credentials
If available click on Option 2 - Payflow Pro
Click on Set Up Payflow Pro API Access
Click Create access (creating a new set of credentials seems to help with the integration)
Copy and paste the credentials from your PayPal Account into Gravity Forms
If you do not see any of these options in your legacy Pro Account then you will need to see if Gravity Forms will allow you to add the Legacy Pro Add On.
Thank you,
Jennifer
... View more