@vmevada102 yes this is in theory possible. However, at least the European Galaxy server has way more CPUs than GPUs. This means while a single user can maybe profit from GPU support we can run more jobs in parallel on CPUs at the moment. So overall all users profit currently more from CPU-Gromacs.
If you really need GPU because you are running a bigger project please get in contact with us and we can find a solution. The crucial part is to setup a container with GPU support and GROMACS that can run on the given infrastructure. This is not really a Galaxy problem.
Hope that helps a little bit,