OldSlugger8 provided a good link to see what is required. See page 11 in the link to see the combinations of core GPA and ACT scores which would allow you to qualify.
Please understand that your overall GPA isn't a determining factor. Instead it is the core GPA-- the grades you received in subjects including english, science, math, history, etc.
If your combination of core GPA and ACT (or SAT) scores isn't over the threshold, then you will be considered a non-qualifier. In that case, you can't even practice or tryout for the team (at a D1 school), nor can you get an athletic scholarship. Also you would only be eliglible in the future for 3 seasons of competition, rather than the usual 4. There is a way to get 4 seasons, but it is pretty difficult.
If you do turn out to be a non-qualifier, then you'll need to consider carefully your options. Considering only baseball, it may be better to attend a JUCO. On the other hand, it sounds like you have recently become more serious about your studies, and it may be better to focus on that during your freshman year at a 4 year school.