Would a non-magical individual (i.e a Muggle or a Squib) show up on the Marauder's Map? I think I'm wondering moreso about Muggles really, and how the Marauder's Map would deal with a Muggle who managed to access the castle.
In Goblet of Fire we learned that Hogwarts is highly protected from discovery by Muggles by various charms, spells, and hexes; this suggests Hogwarts is basically impossible to outright find if one were to actually go looking for it. We know this much, so let's set that aside. If a Muggle somehow accidentally breached Hogwarts' protective wards and actually stumbled onto the Hogwarts grounds or into the castle itself, would he or she show up on the Marauder's Map? Why or why not?
Just as a general FYI, I still dislike the Harry Potter wikia as a reference.