Can I realistically push my 2.94 science GPA to 3.0 by this winter?

[shinee_alpaca]

I'm considering reapplying to graduate school at the end of the year in a Master's Biological science program. I am a little scared because my overall GPA is 3.42 and within range of accepted students, but I got told my committees that the biggest concern was my science GPA being only around a 2.94-2.98! Barely a 3.0! I knew my grades weren't top tier when I graduated, which is why I worked for a little over a year as a lab tech, did other science education activities on the side, and volunteered as a research assistant at another lab in my hometown's university right when I found I got rejected, so I've been hoping my working experience would offset a borderline GPA. However, I can't see myself doing the lab tech job long term, which is why I am interested in going to graduate school to further my research and reapplying again.

The weird issue is that many of my programs want a 3.0 GPA minimum during the last 2 years of my education - which I definitely have. But because I never realized how borderline I was with my science GPA, I plan to cut back on my activities, go back to school this fall part-time to rectify my GPA and hopefully raise it up just slightly so I don't get screened out by applications when they're due around January. Many of my programs range of average accepted science GPAs were from 3.18 to 3.8, and I know even if I take extra classes, I'd still be borderline at the low end of the accepted range.

I tried talking to an adviser what to do about my GPA and he's suggested that in addition to a Cell Physiology and RNA Biology class I wanted to take this fall that I take all these random biology classes such as Fossil Record and Plant Anatomy (basically both not in my desired concentration and classes that I do not need to get into my programs) for 3-4 semesters and that it was not feasible for me to even apply this fall. Waiting 2 more years just to apply again makes me feel bummed because I just feel like a sitting duck. I'm also not rich, so I don't want to take 2 years worth of classes when I'm not eligible for many of the student scholarships anymore.

Should I try applying anyway this cycle and hope for the best or should I follow adviser's wacky advice and take random Bio classes not related to what I want to do for 2 years, even though I don't need them?