Why would you pick Go over Julia for that domain? Julia was made specifically for scientific computing, it's performant, has better array and number support, and allows unicode for mathematical variable and function names. It also has excellent concurrency like Go, but most of the work on the language and libraries is centered around data engineering and scientific computing.

People can use whatever language works for them, and Go has it's plusses, but I would hate to see popularity get in the way of a good new language like Julia in a domain it was intended for. It would be like if R were relatively new, and everyone wanted to use Javascript instead for statistical computing. Use the right tool for the job.