gasp at (someone or something)
To make a sharp or sudden inhale ("gasp") in surprise at someone or something. I gasped at my mom when she told me I wasn't allowed to go to the party. We all gasped at the news of Mary's pregnancy.
gasp at someone or something
to inhale sharply in surprise or shock at someone or something. I gasped at the sight that lay before me. I saw how weary Denise looked and I gasped at her.