Final answer:
Gladys in reporting the trustee's misconduct of falsifying Medicare patient data to the media can be rightly termed a whistle-blower.
Step-by-step explanation:
In the scenario described, Gladys, a doctor at Talthron Hospital, has taken the step to report unethical behavior within the institution. Considering that she has noticed and is reporting on the falsification of data related to Medicare patients by a trustee and bringing this misconduct to the attention of the media, she can be considered a whistle-blower. Whistle-blowers are individuals who expose information or activities within a private, public or government organization that are deemed illegal, unethical, or not correct.