I have a lengthy two-part tutorial on YouTube about geografting.
I've recently found out, in the course of trying to help someone with a technical issue, that a new step is required when setting up geografts in DS 4.11 (and probably 4.10 also). I've seen a lot of questions on the forum about it but had to really hunt to find an actual answer that worked.
The old procedure can result in a graft that pulls away at the edges, leaving an unsightly gap when mesh subdivision is applied.
Here's the procedure that seems to avert that.
Import your geograft item to Daz Studio, and rig with Figure Setup or Transfer Utility.
Make sure that both the parent figure and the geograft are NOT subdivided and are at Base resolution before starting this. Both should also be in zero pose.
When your graft is rigged and memorized, select the outermost ring of faces on the geograft.
Go to Geometry Editor mode by clicking the icon that looks like some connected dots and a pencil