Even if you don't have a working version of the software yet, it is fairly simple to get GPS data streaming from the prototype configuration by using any appropriate terminal software, such as PuTTY.

As this project progresses, you may want to download some version of a framework, such as the version of the Propeller Debug terminal that the author of this project has created and placed on Git.  You can then experiment to your heart's content with the features provided within that framework, as described in this article, or add additional features to your liking.