Nonbonded interactions on the GPU
As the error tells you: the GROMACS binary has been built without GPU support.
Did you install gromacs with apt-get? Usually these kind of programs are shipped with a basic built, with a lot of features disabled.
If you did built gromacs from source, then cuda was not found during configuration.
I would try building gromacs from source and:

be sure cuda is in your path and check that nvcc and the drivers have a matching version
run cmake and check the output, to see if the video card is recognised
run cmake with -DGMX_GPU=ON

Note that it seems that gromacs doesn't support multiple gpu accelerations( e.g. it is either openCL or cuda, you can't have both)