Awesome information using managed code to program against the GPS device in your Windows Mobile device from Jon Box.
From Managed GPS on BlackJack II:
Managed GPS
The WM6 SDK has a managed code sample, in the C:\Program Files (x86)\Windows Mobile 6 SDK\Samples\Smartphone\CS, called GPS. Originally, this showed up in the WM5 SDK. Anyway, this is a C# solution, named GPS, and comes with two projects, 1) GPS, a .NET CF application project, and 2) a child project that is the managed wrapper of the GPS Intermediate Driver interface. So, kudo's who designed the solution this way so that someone can easily re-use in other applications. The library is namespace'd as Microsoft.WindowsMobile,Samples.Location (note the namespace on the slide, which might make you believe this is in the .NET Compact Framework).