$ sudo apt-get update
$ sudo apt-get install gdc-5-multilib-mipsel-linux-gn

gdc-5-multilib-mipsel-linux-gn is installed in your system.

Make ensure the gdc-5-multilib-mipsel-linux-gn package were installed using the commands given below,

$ sudo dpkg-query -l | grep gdc-5-multilib-mipsel-linux-gn*

You will get with gdc-5-multilib-mipsel-linux-gn package name, version, architecture and description in a table

gdc-5-multilib-mipsel-linux-gn package basic information: