GBS - CE Validity
CE marking of GBS systems is possible, but requires the specific install to be detailed in a technical file, which is then generated inline with the CE Conformance documents to enable self-certification; point to note though, it is only possible to offer this route with 14122 compliant systems as this is the only standard that sits under a directive to which a CE mark can be applied.
So the GBS has to comply/be designed in accordance with 14122 from the outset, not 6180.