even more, now the wordpress gallery shortcodes are supported, with the old post ids, i.e. [gallery ids="123,456,789"] shortcodes can be converted to, either, <img> tags, if you want a gallery plugin, you can then use @psychobunny's nodebb-plugin-gallery, or you can just convert the ids to full URLs which then you can use within your own plugin.

read this section for more details