Nope, but one poster named Nirgon used EQMac as evidence that was and got it changed.
Here is my bug thread that got it reduced to a "chance" of him seeing invis, although I killed him a dozen times and he didn't see invis only once.
And I've never heard of a monster either spawning with or without the chance to see invis, especially not a guard who patrols the gatehouse in the most heavily traveled city in the game.