Visual Composer makes it easier to add a form created using the Gravity Forms plugin through its interface.
Once the Gravity Forms plugin is installed and activated, a form can be created under Forms - New form:
You can check the detailed process of creating form fields on the Gravity Forms website. Upon saving the form, the next step is to add it to the page.
To add a form, download the Gravity Forms element from the Visual Composer Hub:
Upon adding it onto the page, you can select the form which was previously created. You can also choose to show/hide the title and description in its settings.