It seems running… my guess would be that you are using a DP monitor, while nvoverlaysink expects hdmi by default. You would try setting display-id property of nvoverlaysink :
gst-launch-1.0 nvarguscamerasrc ! 'video/x-raw(memory:NVMM), format=(string)NV12, framerate=(fraction)30/1' ! nvivafilter cuda-process=true customer-lib-name="libnvsample_cudaprocess.so" ! 'video/x-raw(memory:NVMM), format=(string)NV12' ! nvoverlaysink display-id=1 -e