Let's see the Prisma SD-WAN GCP Reference Architecture.
The Prisma SD-WAN GCP reference architecture
shows an example of branch deployments connecting to applications
hosted in different GCP VPCs with the Prisma SD-WAN ION in GCP,
acting in a data center deployment model.
With cloud services such as GCP, there may be a single VPC with
workloads behind it as previously shown. However, there may be instances
where there are multiple workloads and associated VPCs. In order
to accomplish this, Google implements VPC Peering.
For more complex deployments where HA (High Availability) Virtual
Appliances are needed and/or multi-region support with deployment automation,
see the GCP-NCC CloudBlade Integration Guide on
the Prisma SD-WAN.