Could be that gigi isn't ready to cross to the bridge and is visiting your daughter because she is not ready to let go of this world. In gig's mind, maybe she felt closer to your daughter is coming to her in her dreams. If these dreams upset your daughter, tell her the next time she dreams to ask gig to go on and cross over to the other world where she belongs now.

I believe in the dream visits and have had them myself and so has my sister.