That would definitely not be a win for me Joe,
All my editing is done via my host editor.
From there only as and when I need to do I use Denoise AI, Sharpen(mainly Stabilize) or some of the many other plugins I have in my toolbox.
Nearly all of my photo images are from cameras which have more than enough pixels for the resolution the images will be used for so I actually very rarely need to use Gigapixel AI, and I certainly wouldn’t want to run anything from it as a plugin.
Perhaps to further explain. After the basic Raw development functions, one of the functions I would use most is the crop tool, but those crops rarely take huge amounts off of the original image, they are mainly just tweaks. For efficiency I use a crop function in the host editor that also resizes at the same time. It’s instantaneous, and the resize algorithm gives a perfectly acceptable result for images that will either shown on a TV, or printed at a max size of A4. I don’t need the AI capability of Gigapixel for this type of resize, and it is way too slow for general use. It’s a good tool to have when I need to do a significant enlargement from a low res source but that isn’t often.
Every one has there own way of doing things of course.