Solution - 1

try this

<?php

    $post_title = 'my_post';
	$postData = get_page_by_title( $post_title, 'OBJECT' , 'post');
	$postID = $postData->ID;
	
	if(!empty($postID)) {

		echo do_shortcode('[gallery] id="'.$postID.'"]');

	}
	
	?>

Solution - 2

Do you want to show gallery based on the name of the album? ex:

<?php
$album_name = 'ABC';

$display = get_gallery_by_name($album_name);

// Or do_shortcode('[gallery name="'.$album_name.'"]');
?>