In Gravity Forms, go to Settings > ReCaptcha and enable Universal
Go to Google
ReCaptcha Manage (login)
Under RecCaptcha keys click "+ Create Key"
Fill in name and domain and click to continue.
Next page, click "Continue with instructions"
Back on site in Gravity Forms, select Recaptcha-2025 as project ID. Then select the name you just created at Google's site.
Choose 0.8 as the threshold.
Save settings.
Back at Google click "continue to next step," then ignore the instructions and click until you get to the Review section where it says to trigger an event on the site.
Fill out test form on site.
Back at Google, click Go to Key Overview.
It may take a few minutes for it to register.
Confirm recaptcha is working by looking for a recaptcha score in the form entries list. Also at Google in the list of Keys it should say "Key Status" Protected.