In my opinion, the big rub for using Go in scientific computing is the lack of a REPL. The nature of Go essentially requires it to compile. On the plus side, compilation is very fast so iterating small code changes is practical. But it's still not nearly as nice as typing commands into the prompt and seeing what happens.

Beyond that, Go is easy and performant. It's great for paralellizing workflows via concurrency and compiling tools for distribution. So if you know what you want to do and need to scale up, it could be a great choice.