Um, no. Because then it would be Granddaughter, not Great-Granddaughter.

Hana -> Glitch -> DG is the official straight-down-the-tree "Kage Family Line". With the Cains, it's:

Hana -> Glitch(xWyatt Cain) -> DG + Jeb Cain

SO AT THIS POINT SHE'S ONLY GOT NON-BIOLOGICAL GRANDCHILDREN, although DG is kind of between daughter and granddaughter. But according to Kage, this is The Line. Yuki would be the next generation, meaning she has at least one parent related to DG or Jeb.