And getting scholarships depending on how good your GPA is
Ivy League Universities look at your application holistically, so if you seem like a candidate that will thrive in such an environment they will pick you. This means that there are more factors in applications than simply GPA or SAT. You have to show that you were competitive in comparison to your peers and tell a story about yourself.
However, statistically the admission rate to an Ivy League institute, as a international student is about 5%. Lower than if you were a U.S citizen.
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It would all depend on the specific one but a scholarship based on your GPA would be a merit scholarship.