For sure anything is possible, but finding it out in the semi-wild (as opposed to hopping out of your imported cabbage or in the tropical plant section of home dept or in the parking lot of a reptile expo or something else likely to have come from the Texas area in this case) you pretty much expect there to be a breeding population around. This starts to get unlikely that it's gone unnoticed this far from it's usual range. But, as you say, it's not impossible.