Is there a place where I can format the gallery posts to be full width? Meaning, when I log in to a gallery, I am seeing a 2-column layout similar to your site. I am looking for only the gallery images to be displayed and not the right side bar.
You need to create a page template for your galleries and remove the sidebar.
once you create your template go to settings > gallery > template and select your template. if you are using the standard WordPress template name your template “single-ims_gallery.php”