Texas Labor Code - LAB § 52.063. Immunity from Civil Liability

(a) Except in cases of gross negligence, a public or private employer, or the employer's principal, officer, director, employee, or agent, is not liable in a civil action for personal injury, death, property damage, or any other damages resulting from or arising out of an occurrence involving a firearm or ammunition that the employer is required to allow on the employer's property under this subchapter.

(b) The presence of a firearm or ammunition on an employer's property under the authority of this subchapter does not by itself constitute a failure by the employer to provide a safe workplace.

(c) For purposes of this section, a public or private employer, or the employer's principal, officer, director, employee, or agent, does not have a duty: