From my common knowledge as a student who was once a Nursing major, I can say the Nursing major is certainly very limited in terms of vacant spaces in classes and clinical rotation placements. My freshman year (a few years ago), the average GPA for incoming Nursing majors was a 3.8. The following year, it was about 4.0, so I would imagine it’s in that range.
Don’t be too daunted if you don’t have that exact GPA—this is an average, which means that about 50% of admitted Nursing majors have below the average GPA. The information about average ACT scores isn’t publicly posted on the website, but most people scored 28-30, I believe.