I will consider adding it in the near future. It was originally on the roadmap, but don't have any experience with either Relay or GraphQL. In any case, I will open an issue on GitHub for this and do some research later.
That would be awesome! I've been working with Relay and GraphQL since they were released. Having messed with most of the boilerplates in that ecosystem, this one is the best IMO: https://github.com/fortruce/relay-skeleton
But I would love to see it with a testing framework, a css pre-processor and a production build script.