Merge pull request #51756 from mjpytlak/osdocs-4339

OSDOCS-4339: Added gcp to platform parameter

Author: mjpytlak

modules/installation-configuration-parameters.adoc

@@ -261,7 +261,7 @@ The string must be 14 characters or fewer long.
 endif::osp[]
 
 |`platform`
-|The configuration for the specific platform upon which to perform the installation: `alibabacloud`, `aws`, `baremetal`, `azure`, `ibmcloud`, `nutanix`, `openstack`, `ovirt`, `vsphere`, or `{}`. For additional information about `platform.<platform>` parameters, consult the table for your specific platform that follows.
+|The configuration for the specific platform upon which to perform the installation: `alibabacloud`, `aws`, `baremetal`, `azure`, `gcp`, `ibmcloud`, `nutanix`, `openstack`, `ovirt`, `vsphere`, or `{}`. For additional information about `platform.<platform>` parameters, consult the table for your specific platform that follows.
 |Object
 
 ifndef::openshift-origin[]