There are few Glossies along the upper TX coast, especially in winter, but they do occur. In fact, we see more and more each year, it seems. The overwhelming majority of Plegadis ibis are White-faced.
During the winter, they are harder to tell apart. Eye color (red = White-faced, brown = Glossy) is a key. Facial skin coloration is muted in winter, so it is not always reliable. However, the shape of the facial skin is in need of a look.
If the whitish coloration encircles the back of the eye, you have a White-faced. If bluish (brighter, sky blue during breeding season) lines extend to the eye, but not behind it, you have a Glossy.
I was unable to tell whether the light coloration extended behind the eye in your pics, but you might have enough to go on now.
If these are Glossies, please put them in eBird and post them to TEXBIRDS, as the record would be of interest to area birders.