Google Cloud 3-Tier Kubernetes Application provides cloud-native containerized three-tier application deployment using Google Kubernetes Engine (GKE). Frontend tier runs Nginx or custom web containers exposed via Kubernetes Ingress with TLS termination. Backend tier runs application containers (Java/Node.js/Python) organized in Deployments and StatefulSets. Database tier uses Cloud SQL or Firestore with persistent volume claims for state management. Horizontal Pod Autoscaling (HPA) automatically scales pod replicas based on CPU/memory/custom metrics. Vertical Pod Autoscaling (VPA) optimizes resource requests based on actual usage. Service mesh (Anthos Service Mesh) enables advanced traffic management, canary deployments, and mutual TLS between services. NetworkPolicies enforce fine-grained pod-to-pod communication rules. ConfigMaps and Secrets manage configuration and credentials securely. Pod Disruption Budgets maintain availability during updates. CloudSQL Proxy provides secure database access. GKE workload identity enables pod authentication without storing keys. Multi-cluster deployments distribute workloads across regions. Persistent volumes enable data durability. GKE Autopilot simplifies cluster management. Cloud Logging collects all pod logs. Cloud Monitoring tracks pod and cluster metrics. Cloud Trace enables distributed tracing across microservices.