Godzilla is a ES2015 to Go source code transpiler and runtime that is intended to be a near drop-in replacement for Node.js. It compiles ES2015 source code to Go source code which is then compiled to native code. The compiled Go source code is a series of calls to the Godzilla runtime, a Go library serving a similar purpose to Node.js.
Godzilla parses ES2015 source code with the awesome babylon. That means at the moment Node.js is required for compilation. As Godzilla becomes mature,
... read the whole story at github.com.
babylon will be compiled to Go source code using Godzilla itself so that the Node.js dependency can be dropped.