placing a widget in a custom tab

Question

Create product tab that displays custom attribute - Ultimo Theme

I have done this and created a Tab.

I want this tab to display a gallery that I have created with an extension.

{{block type="gallery/show" id="front-page-gallery"}}

I am given this display code.

However all that displays is the code, How do I get it to display the gallery. I tried placing it in a block, and that had the same results.