GitHub Actions orchestrates a complete CI/CD pipeline deploying containerized applications to GCP GKE using blue-green deployment strategy with zero-downtime releases. Developer commits trigger GitHub Actions, which authenticates via Workload Identity Federation, builds Docker images, pushes to Artifact Registry, and runs unit and integration tests before requesting approval. Upon approval, the pipeline deploys new pods to the green namespace while the blue namespace remains active; Cloud Load Balancing switches traffic only after validation, with Cloud Monitoring enabling instant rollback if issues arise. This architecture eliminates deployment risk by maintaining two production-ready environments, allowing teams to test changes in isolation before traffic cutover. Fork this diagram on Diagrams.so to customize namespaces, add additional test stages, or integrate with your GitOps workflow. Cloud Armor provides DDoS and WAF protection at the edge, while Cloud Storage persists artifacts and state for audit and recovery.