Download Gravity Perks - Media Library 1.2.31 from nulled fire. Upload your files from Gravity Forms to the WordPress Media Library and Advanced Custom Fields.
Fixed an issue introduced in Gravity Forms 2.7.13.1 where existing files in a Multi File Upload field were lost when editing an entry via a Gravity Form.
Updated gpml_delete_entry_files_from_media_library PHP filter hook to include a new $form param and also have a form-specific variation (e.g. gpml_delete_entry_files_from_media_library_29).