"It has been in the pipeline for quite a while; they are finally changing the floor number at Millennium Point to be less confusing.  Out are G2, G1, G0, L1, L2, L3 (roof space) and L4 (top of IMAX which can be accessed by the lift next to where iBar used to be) and will change to floors 1 to 7. When this will happen is anyone’s guess with Millennium Point, a couple of years perhaps."

Millennium Point floor numbers to change « Birmingham Eastside