The global warming potential is an attempt to provide a simple measure of the relative radiative effects of the emissions of various greenhouse gases. (drtimball.com)
I wouldn't go so far to say that the collective climate science community has completely moved on from the idea, but I'd argue that GWP is a rather outdated and fairly useless metric for comparing various greenhouse gases. (realclimate.org)
Our study empirically investigates the effects of the Kyoto Protocol's quantified emission limitation or reduction commitments on various greenhouse gas (GHG) emissions such as CO2, CH4, N2O and other greenhouse gases, consisting of HFCs, PFCs and SF6. (mpra.ub.uni-muenchen.de)