Will only taking half of my school's offered APs look bad to colleges?

Look at your targets like GT
It’s not how many but which ones. GT is an AP happy school. I think some of those kids start AP classes in nursery school ?..they like 8-12 but certain ones count and certain ones really don’t matter.

Also you are compared to your school. What is the “normal” amount that kids take for those schools.

Lastly, don’t take an AP if you can’t keep your grades up
I know your a great student but just saying. Some people like my son found AP classes easier then his honor classes… Everyone is different