gRPC is an open-source Remote Procedure Call mechanism developed by Google. It allows applications written in a range of well-known programming languages, including Go, to exchange data.
This is important to Go developers because most of us work in an existing software environment written in Java, C# or whatever, and anything we write in Go will have to interwork with that.
The Go version of the gRPC distribution includes example of clients and servers communicating over a clear-text channel, but they don't show how to create an encrypted (SSL) channel. Encrypted channels are required in many enterprise environments, so I enhanced one of Google's examples showing how to do it.
The github page for my enhanced example explains how to install Protocol Buffers and gRPC. It can be found here.