From what we've seen about Buccellati unzipping his own body parts, I don't think that would work. He still controls his separated hands, and his separated heart still beats for him.
And doesn't Giorno use the Stand's hands for healing? Giving Giorno someone else's hand won't give Gold Experience a new one, and giving GE another Stand's hand shouldn't work either, it would keep the donor's ability. Then again, there's Abbacchio. Maybe his Stand can playback a recording of Gold Experience's healing, I wonder how that would work?
But Giorno did account for that and made a back-up hand, so we'll never know.