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 over them.
Now you should be able to select the outermost ring of faces on the graft (right-click and choose a Mode like Drag to make this easier). Remember that you can hold CTRL to add to your selection without losing it if you need to let go of the mouse button to move the camera or something.
Right-Click and choose Geometry Assignment, then Set Graft Faces For Attachment. In the popup, choose Genesis 8 (or whatever figure the graft is for).
Now select Genesis 8 (or whatever figure).
Select all of the faces that are covered by the geograft. All of them, not just the innermost ones.
Right-click and choose Geometry Assignment, then Set Auto-Hide Faces for Attachment. Choose the graft from the popup.
Now select a ring of polygons OUTSIDE the border of the geograft, still on Genesis 8 (or whatever figure).
Right-click and choose Geometry Assignment, then Set Graft Faces for Fitted Figure. Choose the graft again from the popup.
Now you should be able to click back to Transform mode (hit the widget with four arrows pointing in all directions). Unconform the graft from Genesis 8 (or whatever figure) and then conform it again.
Now it should fit without gaps even when you turn the resolution back to High. Save it to the library using File--Save As--Scene Asset--Figure/Prop Asset.
In my testing this seems to work in DS 4.11 Beta.