Although Gravity Forms does not offer any type of built-in integrations for any page builders, it still works with most, if not all, page builders on the market today.
This is because Gravity Forms uses a shortcode for embedding the form into a page, and all page builders either have a shortcode or HTML element that can be used to add the shortcode.
There is only one page builder that I am aware of that offers a built-in Gravity Forms Element which is Avada, however, I’m not sure if it supports using Avada to style your forms.
Most popular page builders like Elementor and Divi have third party add-ons that add a Gravity Forms element or module that can be used for adding your forms to a page and using the page builder for styling your forms.