“Buckets” for admission are common. Here is an example of explicit bucketing by major, based on departmental capacity for each major:
The basic formula is HS GPA (recalculated with limited weighting) times 800. Add math GPA times 400 for engineering majors. For non-engineering majors, you can divide the index score by 800 to see what HS GPA the threshold corresponds to. You can see that, while some majors like biology, linguistics, and physics only needed a 2.5 to get admitted, other majors were much more selective, like computer science (4.3), animation (4.0), and pre-nursing (3.95).