* Some colleges are test-optional or test-blind: These colleges either don't require SAT/ACT scores, or actively disregard them in the admissions process. For these schools, GPA and the rest of the application are far more important.
* Highly selective colleges often place significant weight on SAT/ACT scores: For extremely competitive universities, a strong SAT/ACT score can be a key factor in separating applicants, even with strong GPAs. They use the scores as another data point to assess academic potential.
* Many colleges consider both GPA and SAT/ACT scores as part of a holistic review process: This is the most common approach. They look at the entire application, including GPA, SAT/ACT scores, extracurricular activities, essays, letters of recommendation, and more. A strong GPA might compensate for a slightly lower SAT score, or vice-versa.
In short: There's no universal answer. You need to research the specific admissions policies of each college you're applying to to understand the relative weight they place on SAT scores and GPA.