Yes, I would like to see you add another section dealing strictly with GTs. At the risk of getting banned, just minutes after registering, I would like to confess that I have no interest in the GT40, just the GT. The TOS (that I just agreed to) states that if I am not interested in the GT40 to not register - I did anyway.
I don't think you will get much traffic for a while but I think you'll convert more Guests to Members if they do have their own section and forums. And my guess is more of your future growth will come from GT enthusiasts than from the GT40.
No, I'll never own a GT but I love them anyway.