$ sudo apt-get update
$ sudo apt-get install gforge-db-postgresql 

gforge-db-postgresql is installed in your system.

Make ensure the gforge-db-postgresql package were installed using the commands given below,

$ sudo dpkg-query -l | grep gforge-db-postgresql *

You will get with gforge-db-postgresql package name, version, architecture and description in a table

gforge-db-postgresql package basic information: