Gale is a Necromancer ...
One of his barks states: "How foolish theese mortals are." (Or something among those lines.)
Thanks for that nudge, I've been meaning to look up that quote for ages as it rang a bell!
He says, I believe, "what fools these mortals be” which, according to my googling just now, is a line spoken by Puck in Shakespeare’s A Midsummer Night’s Dream to the fairy king, Oberon, and is about the foolish antics of four mortals who, lost in the woods, are trying to reconcile their various love affairs. I'm not sure how a Faerunian wizard picked up Shakespeare, but is there a local equivalent? The archaic/poetic formulation and way he says it does feel like he's quoting something, and the context of people lost and muddling through would make the Shakespearian quote fitting ... if only quoting Shakespeare were appropriate at all!
Of course, anything's possible, but I'm not yet going to infer from that quote at least that Gale is not himself mortal, rather than that he has literary pretensions (which we knew already, especially if we showed any interest in romance with him).