$ sudo apt-get update
$ sudo apt-get install libreoffice-avmedia-backend-gs

libreoffice-avmedia-backend-gs is installed in your system.

Make ensure the libreoffice-avmedia-backend-gs package were installed using the commands given below,

$ sudo dpkg-query -l | grep libreoffice-avmedia-backend-gs*

You will get with libreoffice-avmedia-backend-gs package name, version, architecture and description in a table

libreoffice-avmedia-backend-gs package basic information: