G Maps provides a basic mapping experience for Windows 8 and Windows RT users.
If Bing Maps isn't to your fancy and you want Google maps on your Windows 8 or RT device, G Maps will give you that, but with a lot of compromises. Opening G Maps will show you basic map data that it sources from Google Maps. You can toggle between different views like satellite and topography.
You'll notice that G Maps has the ability to find directions for you too. Unfortunately, they don't work. Whenever we tried looking up directions, G Maps would crash consistently, rendering this feature useless. There is also no traffic information of any kind.
Also noticeably lacking from G Maps is detailed information about points of interest. You tapping or clicking on a point of interest will pull up basic information but is not nearly as rich of an experience as Google Maps in the browser. G Maps is as useful as a paper map. At least the paper map doesn't crash.
With so many features lacking and stability issues, it's impossible to recommend G Maps over the included Bing Maps.