Connecting Non Mesh Consul Servers to a Consul Mesh in Another Data Centre

Hi Everyone,
We are currently running Consul as a Service Registry internally on an OpenShift cluster, we about to run a Consul Service Mesh on GCP GKE and need to be able to synchronise the registries between internal and GCP.
The challenge we have is we can’t run a mesh internally due to corporate constraints on the Openshift Cluster.
My question is, can we connect our internal Consul servers to our GCP Consul Mesh, through the GCP Mesh Gateway without enabling Consul Connect internally?