Take a look at the new GB airways website:
www.gbairways.com This looks more and more like a low cost airline... new logo with dot com hmmmm... my guess would be that GB Airways would be going their own way, and would not remain as a BA Franchise.
Why would they have a booking system on their main page now when they used the BA one previously??
Taking over BA at gatwick is the dream of some crew at GB, but it is exactly that, a Dream.