Most institutions require that you apply for the WRGP rate BEFORE you begin classes. You can contact the graduate admissions office or your program’s department to see if it is possible, but it is unlikely that they will award the WRGP rate retroactively. In addition, make sure that if you were awarded the WRGP rate that you have it in writing from your enrolling institution.
I just learned about WRGP and already started classes. Can I apply for the WRGP rate after I’ve enrolled?
Western Regional Graduate Program (WRGP)