The current verification steps after the GPU Add-On is installed show that the Add-On is present and that taints are present but do not actually test that GPU functionality is available.

Erwan Gallen has suggested that we add the command line tests used for the GPU Operator as verification steps. These are covered here:
https://egallen.com/openshift-baremetal-gpu/

NVIDIA's docs cover this in more detail (contact: Kevin Quinn in CCS)
https://docs.nvidia.com/datacenter/cloud-native/gpu-operator/openshift/install-gpu-ocp.html#running-a-sample-gpu-application