I don't know this field, perhaps my bar is low because of Python lol, but Go's GC has very short GC pauses. So short that it makes non-GC'd usecases less attractive imo.
My big issue with Go's GC, or GC's in general, is consistency. Go's GC can still be variable in pause time iirc. But it's been ~3 years since i've worked in it - so maybe my memory is wrong :)