I find I am unable, on brief consideration, to conceive of a GLUT sitting in some real world within which my observable universe is being computed... I have no sense of what such a thing might be like, or what its existence implies about the real world and how it differs from my observed simulation, or really much of anything interesting.

It's possible that I might be able to if I thought about it for noticeably longer than I'm inclined to.

If you can do so easily, good for you.