The WPK External Images Gallery plugin integrates perfectly with any WordPress installation, be it a single installation or a MultiSite one.
Once the plugin is activated all posts will display a new meta box on their edit screens where you can create your custom gallery using remotely stored images. The gallery manipulation is done through AJAX, therefore is no need to click the Update button for your posts, pages or products after any action taken in the WPK External Images Gallerymeta box.
The WPK External Images Gallery is incredibly easy to use, it is responsive and very configurable. Every gallery can be customized individually for each post by choosing the number of columns to generate for each row. You can also set the height of the images so they look great on your pages, yes say goodbye to hard-coded sizes and headaches caused by editing core files.
WPK External Images Gallery also provides a custom hook so you can use it in your theme to register other custom post types if your theme has any, in order to enable the gallery on them too!