GPU support is yet to be included in WRF. There is limit code in 3.6. Nothing additional was
mentioned in 3.7.
I spent a lot of time this past spring tying to get speedups on STAMPEDE, but couldn't. The
fastest I could get was the ordinary everyday compile.
Any modern supercomputer should have no problem.
Kevin W. Thomas
Center for Analysis and Prediction of Storms
University of Oklahoma