Texas Prohibited locations for a concealed weapon.
Oh, and Texas has some of the loosest gun laws of any state.
Places Weapons Prohibited

(a) A person commits an offense if the person intentionally, knowingly, or recklessly possesses or goes with a firearm, illegal knife, club, or prohibited ...

I Can't find it in all these pages. But the law is very clear... No guns on school campus even with a CCWL.