The Gravity Forms + Custom Post Types plugin has been working great for me, with one exception. A multi-select gravity form field only appears to pass one of the selected values when reviewing the draft post in the admin panel. For example, I have a "State" field where a user can choose "Alabama, Illinois, California", etc. When the custom post is created, that "State" field shows only "Alabama" selected. I have made sure to tell ACF that this select field can accept multiple values.