Using Meow Gallery to Display ACF Galleries

meow-acf.php

// Need to set the shortcut parameter in the post template where the gallery will be displayed.

[meow-gallery acf=1]

// Hook up to intercept the gallery shortcode and check for attribute.

add_filter(
	'shortcode_atts_gallery',
	function( $result, $defaults, $atts ) {
		if ( 1== $atts['acf']) { // The ACF gallery MUST be set to return IDs for this to work!
			$gallery_id_array = get_field( 'gallery_event_gallery', get_the_ID() );
			$ids              = implode( ',', $gallery_id_array );
			$result['ids']    = $ids;
		}
		return $result;
	},
	10,
	3
);