I'm confused because this plugin seems to be anything but responsive once a user taps on an image in the grid using a small screen such as on a smartphone. Doing so invokes a conventional lightbox that is not responsive and even caused a critical problem on an iPhone.
An example is on the demo page when visited on my iPhone: http://bdwm.be/rgg/demo/
Tapping an image in the grid (I tried the spider web shot) brings up a huge image that makes me scroll way off the edges just to find a way to deactivate the annoyingly huge lightbox. In fact, this caused a critical bug that forced me to close the Safari browser tab because the image could NOT be closed. While hunting about to kill the lightbox, the image eventually disappeared though the lightbox background did not with no "X" button available to close it.
To be clear, the grid is nicely responsive, but the larger lightbox image once a grid block is tapped was not so I'm not sure how this qualifies as a viable responsive solution.
Am I missing something obvious? I'm using an iPhone 4S with latest iOS 6.1.3 on Safari.