Maybe I'm old, but I immediately assumed this was an OS built around the Gopher-protocol[1], whatever that would mean in practice. Gopher is already an established name, so the naming seems a bit unfortunate. [1] https://en.m.wikipedia.org/wiki/Gopher_(protocol)
Just because something is no longer in common/widespread use, does not mean you can come along and use its meaning or name on your shiny new product.
Gopher the protocol maybe niche these days, but it's not dead. The continued use of the term 'Gopher-XYZ' by the Go language people will only accelerate the death of the Gopher protocol, which although inevitable it does not mean it should be erased from history by something else.