Advanced Custom Fields for WordPress Developers – https://www.advancedcustomfields.com/
Order posts by custom fields – https://www.advancedcustomfields.com/resources/orde-posts-by-custom-fields/
Gallery – https://www.advancedcustomfields.com/resources/gallery/
Как устроены Advanced Custom Fields в WordPress – https://habr.com/ru/post/569852/
Плагины к плагину
WordPress ACF Field for OpenStreetMap – https://wordpress.org/plugins/acf-openstreetmap-field/