"Minimum" means the lowest something can be and still be acceptable. If YOUR chapter's minimum GPA is a 2.5, then a 2.52 should keep you active -- but you're on a slippery slope there, so I'd be putting academics before sorority social life.
As for the 2.49, you're just under the acceptable mark, assuming 2.5 is also the minimum for your particular chapter. Usually, the probation doesn't exclude you from meetings, but costs you your voting rights. This, though, depends on your chapter's policy for such things. Hopefully, they have study hours, sister -tutoring and other resources to help members whose GPA's have slipped. Buckle down and commit to getting your GPA up. You'll survive a semester of probation, you really will.
