When should linux-gcp be used?

I'm currently looking into a kernel bug and noticed that as well as the “standard” kernels there are also cloud-related kernels, one of which is “linux-gcp”.

On GCP I have launched multiple Ubuntu instances and none of them come with this package installed, so my question is this: when should linux-gcp be installed? What is its purpose? Does it have optimisations that the “virtual” (or generic) kernels do not have?

I've also noticed a possible bug in the way that GCP monitors CPU usage and I'm wondering if the linux-gcp package is designed to communicate correctly with the back end.