One of the things that I love about GT as compared to Jamplay is that there is a backing track for many of the lessons. Even those where you are just learning beginner stuff. On the other hand, it is frustrating using them in the beginning. It's almost like you are suddenly on stage performing in front of people and you freeze. Without a backing track, you are free to be out of time and make mistakes. However, that's not music. I have found that if I can't jump into the track right away, I just make sure that I know all the notes, chords, and timing. Also, I make sure that I can play as fast as the track. With that background, you should not be overwhelmed with the tracks.
With all that said, using the backing tracks on GT makes you feel, at a very early stage in your playing, that you can play music. What an incentive.