I mean even the announcers, I think it was Herbsteit, said that the report Gabriel got from the NFL was that he was going to be an UDFA. Maybe they are wrong about him, but I wouldn't spend a high pick on a guy that is likely thought of as an UDFA. If you really like him and want to make sure you get him, maybe you use a 6th or a 7th, but no higher than than.
Frankly, I think Rattler is a better prospect that any of the QBs in this draft including Sanders and Ward.