Fender bought Guild in the late 90s but the old Guild bass strings were discontinued before that, since Guild had discontinued all their basses a few years earlier. And those strings were made for Guild by someone else, I don't know who.
Fender reintroduced Guild basses and made nickel rounds with the Guild name, but there's no connection to the old strings. Besides, they discontinued the basses and strings again,
AFAIK any Guild bass strings you can get online are closeout stock.