Fortran does quite well on almost any major CPU since 1950's, including GPUs.
Actually one of the reasons CUDA won the hearts of researchers over OpenCL, is that Khronos never cared for Fortran, and even C++ was late to the party.
I attended one Khronos webminar where the panel was puzzled with a question from the audience regarding Fortran support roadmap.
NVidia is sponsoring the work on the LLVM Fortran frontend, so same applies.
https://flang.llvm.org/docs/
