I just did a quick test, and this is manageable in the latest version of Illustrator using Graphic Styles. If you apply a Graphic Style to your vector, you can specify if is a “.cut” or “.engrave.vector”, and this gets exported as a class in the SVG that will work in the GFUI. I just did this quickly with a test file, so I didn’t figure out all of the details, but it seems to work. Since I am just learning Illustrator, I don’t know if older versions can support this or not.