Yes. The Galaxy backboard comes with a wall-mounting kit. This enables you to attach the board directly on the wall, also without the moveable frame.
Also handy: the EXIT Galaxy basketball board with a dunk ring is suitable for all Galaxy systems.
The Galaxy backboard is made from 2mm thick polycarbonate. Behind it is a steel frame of 22 by 22 mm. The total thickness of the backboard is therefore 24 mm.