Hey guys and gals, just wondering about using a guitar midi controller in DAWs?

i have a Roland Gk2a midi guitar pickup and a Roland GI10 Guitar to midi interface.

Im using Cubase 5, and have just been using my qwerty keyboard as a controller. I was wondering how i would go about connecting my Gi10 to the computer, so that i can use my guitar as a midi controller in Cubase. Would i need an interface, if so could peeps suggest a good one, or would a simple usb to midi cable suffice?

Thanks in advance!
Sergio 'Checo' Perez 2013 Formula One World Drivers Champion
A simple usb-midi interface will suffice. I've been using the M-Audio Uno without problems, but some people have had problems with it.