Rasing GPA After Graduating College

<p>I have recently graduated from a California State University school with a 2.873 GPA. In order to apply for a specific military job I need to have at least a 3.0 GPA. I was curious if I could do anything to boost my cumulative GPA so that it would show up on my transcript. </p>

<p>I was thinking about enrolling in open university and taking upper division courses at my alma mater.
or
Taking classes at a local community college and transferring them over.</p>

<p>I'm curios if those are even options?</p>