Your workloads will be migrated from GKE without significant changes; the only thing you need to change is to bind the clouds to the provider (input, persistent volumes, etc.). Please note that this is one and the same, regardless of whether you work in GKE or GCE, AWS, Digital Ocean - when moving the environment you will need to make small changes to the definition of workload, if and where it is directly related to the environment .
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