The new GDK Extension allows you to publish games on the Microsoft Store and make use of Xbox Live functionality for implementing features such as save games, player stats, rich presence, achievements and in-app purchases via add-ons. The GDK extension is available for download on GitHub for free.
The GitHub repository also contains the source for the GDK extension (and steps on compiling it), for users who may be curious to know how it was coded and/or wish to expand on it. A demo project is also provided within the same repository.
READ MORE: https://www.yoyogames.com/en/blog/gdk-extensionNote: Packages export with the GDK extension are published via the Partner Center onto the Microsoft Store, so make sure to read its guide as well.