$ sudo apt-get update
$ sudo apt-get install libopencv-gpu-dev 

libopencv-gpu-dev is installed in your system.

Make ensure the libopencv-gpu-dev package were installed using the commands given below,

$ sudo dpkg-query -l | grep libopencv-gpu-dev *

You will get with libopencv-gpu-dev package name, version, architecture and description in a table

libopencv-gpu-dev package basic information: