Google Maps Engine Question on windows 8.1 laptop with USB gps

[steve]

Here's a pretty specific question for all you tech nerds out there. I'm trying to use my Surface Pro 3 as my GPS device on an upcoming road trip. I've got a usb GPS radio to talk to the laptop.

I' ve created a cool route in google maps engine lite (formerly my places). I'm trying to find a way for the google maps engine to recognize the GPS radio and pinpoint my location in relationship to my map on google maps engine.

So far I've been able to use the GPS in google maps, but not the maps engine. Anyone know of any solutions for windows 8.1?