GPS for n00bs (I'm the noob)

I've been perusing the interwebs for a while now trying to find answers to my questions, but haven't had much luck. I just got a new-to-me CF-29 without GPS. I have an external GPS antenna for my vehicle. I have found bits and pieces of useful information here and there, but I'm so new to this that I don't know how/where to use it.

SO. Can y'all please gently enlighten me on how the GPS in these functions, and specifically, what I need and how to install my antenna. All I know is that GPS...

GPS for n00bs (I'm the noob)