Doing a Doing masters in Math or CS when I don't have a good GPA?

I am entering my 4th year of university doing a Major in Math and minoring in CS. I came to uni to try to get a Major in CS but there was a grade cutoff and I didn't make the cut. Luckily I was able to get the Math Major and have been doing it till now. My GPA hasn't improved however, and I am sitting close to a 2.0. I will graduate but with such a GPA, is grad school even worth thinking about? I would like to do something in CS more. But Math wouldn't be bad either... Any thoughts?

Thanks.