Kubernetes CICD - bobbae/gcp GitHub Wiki
Cloud Deploy
Google Cloud Deploy makes managed continuous delivery to GKE.
Skaffold
Skaffold handles the workflow for building, pushing and deploying your application to Kubernetes.
Integrating Cloud Deploy with other systems
https://cloud.google.com/deploy/docs/integrating
Manifest rendering
Cloud Deploy and Skaffold can enable transition to more advanced tools without distrupting the workflow pipelines and render manifests via helm, kustomize and kpt.
Continuous Delivery to GKE
https://cloud.google.com/blog/products/devops-sre/google-cloud-deploy-automates-deploys-to-gke
Kubernetes CICD Tools
https://cloud.redhat.com/blog/top-open-source-ci/cd-tools-for-kubernetes-to-know