Building 48 has a GV with ground floor access (it is HCA), but the 2nd floor is not HCA in any of the OKW GVs.
As already noted, Building 63 has elevator access (only 3 buildings have elevators - 62, 63, 64) to the GV located there, but there is no entry door to the 2nd floor of the GV.
All of the GVs at SSR have elevator access to both the main floor and the 2nd floor.