They should already be installed. GPSes should work "out of the box".
I take it your gps is not working.
After you have booted the machine (without the gps plugged in), open a terminal either by using
Menu> Accessories> Terminal Emulator, or hitting three keys,
<ctrl><alt><t> at the same time.
Plug in your gps.
Enter
Code:
dmesg | tail -n 20
Highlight, copy/paste the output of the last 20 lines from your log file (dmesg) that appear in the terminal to your next post.