Custom Post Type with Custom Permalink to page with hash value

Hello All!

I am creating a custom post type called gallery items.

I have created a PAGE on my site with some advanced js that uses ajax to grab all ‘gallery items’ in via XML and allow various sorting, searching and browsing.

Each time a new gallery item is brought up, I change the hash of the page to the slug of the custom post (www.test.com/mygallery#specific-gallery-item. The js also reads the hash and will load the appropriate item.

For search optimization reasons and other reasons, I want the permalink of the custom post type to fake going to the same url structure needed for the javascript.

I have tried the rewrite, EP_MASK and a number of other things to change the url from being https://www.test.com/gallery_item/my-gallery-item to https://www.test.com/gallery#my-gallery-item – but it either does not work or causes problems in other places.

I feel i may have to go higher than the place like .htaccess, but I am not familiar with coding .htaccess well enough for that kind of rewrite.

Any help would be awesome.