$ sudo apt-get update
$ sudo apt-get install falconpl-gd2 

falconpl-gd2 is installed in your system.

Make ensure the falconpl-gd2 package were installed using the commands given below,

$ sudo dpkg-query -l | grep falconpl-gd2 *

You will get with falconpl-gd2 package name, version, architecture and description in a table

falconpl-gd2 package basic information: