Galleries Added to WordPress for Windows Phone App Version 2.2
WordPress for Windows Phone Version 2.2 was recently released, introducing gallery support for self-hosted sites that run WordPress 3.5 or higher.

Image galleries can be created by attaching at least two images to a post or a page. You can also customize galleries by using the gallery settings.

Galleries come in a number of styles: grid (which is the default style), tiles, square tiles, circles, slideshow. You also have the option to choose the number of columns in a grid, whether to show the images in random order, and whether the image goes to an attachment page of a regular page.

When visitors tap an image on their phones, the gallery will launch in full-screen mode.
You can download the WordPress for Windows Phone App here. You can find more info on the app here.