FusionAuth is a flexible authentication platform that can be hosted, downloaded, or deployed in the cloud. To set up FusionAuth on Google Kubernetes Engine (GKE), you need to have access to Google Cloud Platform, gcloud CLI, kubectl, and Helm. You will also need to create a project, enable billing, and configure the network for private communication. Once your project is set up, you can create a GKE cluster, update the Kubernetes configuration, verify the cluster configuration, create a database, configure the default user, take a break, add the Helm chart repository, configure the values file, search configuration, pod labels, deploy FusionAuth to the cluster, and access FusionAuth.