gape at (someone or something)
To stare at someone or something in surprise, typically with the mouth open. I have some great pictures of the kids gaping at the giraffes at the zoo. It probably wasn't the best reaction, but I was so shocked that I could only gape at Mary when she told me she was pregnant.
gape at someone or something
to stare at someone or something in wonder. Don't just stand there, gaping at me. Come in. Stop gaping at the storm clouds and get in here.