Nah, parent commentator and me both think Nim could be really large. The definition of "systems programming language" is defined by arbitrary lines.
Yes definitions are sometimes nebulous but that doesn’t mean words should lose all meaning and we should stop trying. Systems programming is a useful label for the boot stack, kernel, protocol implementations etc. which support the application layer.
Granted though it means what you meant by "it". I read that as "a systems programming language", but if you specifically meant Nim then I think it can enable a GC.