I’d be glad to look at your file but not sure how best to do that since you can’t post a commercial file here. Maybe if you sent it attached to a PM, I could look it over and get you running, then delete it. Would that work?
So, I downloaded your .ai files and .svg file. As far as I can tell everything is fine except that you have a couple of clipping masks applied. When I selected all and deleted both of them, then saved as SVG, everything loaded up in the GFUI fine. I think the clipping mask might have been preventing you from getting the figures within the cuttable area of the GF.
As far as the SVG file that you posted, it has too much to fit in the bed, so you wouldn’t be able to cut them all at once. But as long as you can move things around and set the ones that are outside the cuttable area to Ignore, you should be fine.