GCP organises permissions differently from AWS and Azure, and that difference is where mistakes happen. This course begins with the resource hierarchy of organisation, folders, and projects, and shows how IAM bindings inherit down it, including the service account impersonation chains that turn a small grant into a large one. You will design VPC networks with firewall rules and Private Google Access, apply VPC Service Controls to build a perimeter around data services, and manage keys with Cloud KMS. Workload identity, GKE hardening, and secure CI/CD access are covered for teams running containers. Detection uses Cloud Logging, Cloud Audit Logs, and Security Command Center, with a practical incident reconstruction exercise.