This add-on adds support for Meta Box plugin. WP Grid Builder natively works with WordPress custom fields. However, if you use a dedicated custom fields plugin like Meta Box, the values may be stored in such a way that they require additional processing to properly filter the content.
This add-on supports all field types generated by Meta Box plugin and makes it easy to filter content, regardless of field complexity. For example, you can filter by a cloneable multiple select field placed in a group.