Torture doesn't get actionable information at Gitmo or Abu Gareb. Especially months or years after original confinement. It just feeds the perversion of the torturer. From the information available, it also seems to be contagious.
I've never accepted that the ends justify the means. I believe the means used define the nature of the individual or country using them.
We do not torture at GITMO. Abu Grahib was not a good situation, I will agree, and it should be telling that those responsible were punished for their actions.