A couple reasons I asked:
I know lot of schools offer Freshman Advantage-esque summer programs. Although I think typically you have to apply/qualify academically for them. Which, despite grammatical evidence to the contrary, the OP may have managed.

If that was the case (or she was allowed to enroll in regular summer classes) I doubt it would be enough class credit to give her sophomore status. Both schools do fall formal recruitment a few weeks into the semester, and will be looking at the HS GPA only for incoming freshman. If you've taken Dual Credit (some MO high schools have this instead of AP—basically, you take an advanced class through a CC or college near your high school for college credit, which then transfers to your post-graduate institution) then 1) those credits usually don't factor into your college GPA and 2) they'll just want your HS GPA/transcript as a freshman anyway.

If you meant you were going to take summer classes at a local community college or something and then transfer the credits to UCM or MSU, then you should keep in mind the registrar's offices are typically pretty busy around the start of semester (when rush is) and could take a while to process.

Yeah.

A group of us were picked to take pre-freshman summer courses. It was a program to help integrate academically strong minorities and athletes into college. We all had 12 credits and over 3.0 GPAs going into our freshman years, which was also beneficial in a GLO sense.

Albeit I graduated from high school in 97, but I took 3 classes that summer after graduation (Eng 101/102 and college algebra). So I'm sure it can be done.

As for the OP and recruitment...a 2.75 GPA may allow you to participate in recruitment, but if the chapters have their own set minimum (could be higher, i.e. 2.9, 3.0), you could see cuts (quite possibly heavy). I don't say this to be mean, but if you don't have that chapters set minimum, they're going to cut you, even if they love you to peices. They have the minimum set by their HQ/EO that they have to follow.

I'm pretty sure at ASU, their first set of cuts are purely GPA related. They are ranked via GPA and whoever isn't meeting the chapters minimum is cut and not invited back.

You need to be prepared and aware that this might happen at your school.

My suggestion, is you need to kick "senioritis" out of your system, focus on your last semester of high school and try to get your GPA up.

As for summer classes, I say hey go for it. If you do better in those (like lets say you have a GPA of 3.2), you can somewhat use that. You will be able to say "hey I know my high school gpa is 2.75 but I took some classes and my college gpa is now 3.2". Does it mean that they won't cut you because of gpa? No, because they might not really care because you are an incoming freshmen and they do look at high school. Who knows what they might do. Each of us greek women are only privy to our own member selection process to which we can't/won't divulge.

This might sound harsh, but you are going to school for an education, not to be greek.