I had GBS many years ago (1963). I can’t exactly remember when carpal tunnel started but I tolerated it, so-to-speak, for approximately 15 years before I finally had the surgery on my right wrist. That was the end of the problem there. The left wrist had always been a much less painful situation. That has never been done and it is actually a lot better. That may have to do with the fact of what my activities are now, as a retired person, compared to what they were when I worked, although I was not in any job that required repetitive movement, other than I drove my car a lot and it bothered me then. Through all of that, it never occurred to me that it could be connected to GBS and the neurologist I had, who looked after me in 1963, never suggested it either. Interesting!