Hi Nihal -
How one implements blue-green deployment is highly dependent upon your tech stack and your deployment topology. You need to figure out an appropriate blue-green approach before you consider how to automate with GoCD or similar. There's much written on the internet about blue-green, I'd suggest you find some material that's appropriate for your stack. Once you've got a desired approach, you will likely have some more specific questions with which we can help you.
I know that didn't answer your question. To answer your question: No. GoCD does not come with any templates for blue-green deployments. If you did end up needing multiple nearly identical pipelines, GoCD's template feature likely would help you avoid some duplication.