Yes v1.0 is supported. Currently only available to paid license holders. When you purchase a license you do not purchase support. Yearly subscribers have paid support. This forum is free for the community to help each other and share information. I just chime in to help from time to time.
Yes I have gone radio silent for some months because infrastructure has to be put in place to take GBS to the next level when you don't have big investors paying the bills. GBS has been around since 2011 (6 years). This is a self funded software. Its amazing how many people think software development is cheap. It is quite the opposite.
The current pricing model for GBS does not allow it to scale up and continue to be updated or to grow the team. One time purchases pays for the work that has already been done not for the future. This will be changing. Just takes time to get things in place.