$ sudo npm install gm
$ sudo npm install -g gm

If want to update the gm package execute the command as below,

$ sudo npm update gm

Update package globally,

$ npm install -g gm

Git clone:

$ sudo  git clone https://github.com/rektide/gm.git

$ sudo  npm install -g ./gm

gm@1.23.0 /usr/lib/node_modules/gm

How to remove gm package :

You can uninstall or remove this package from your node_modules run the command as below,

$ sudo npm uninstall gm

Basic Information of gm NPM Package: