welcome to the fold, Tessa.
One of Jason & Sookie's grandparents was a fairy. As a result, some of this grandparent's descendants may possess special powers - Sookie is a telepathe, Jason we're not sure yet (but he's great in the sack, right?). Also, a fairy's blood is exotic to vampires (why Lorena remarked that Barry's blood tasted different). I get the feeling that Godric, being super old with super keen senses, sniffed the fairy blood in Jason and thus, his intrigue.