Photo Gallery that opens in a Modal Window from a button

I am really loving the theme and the support. Thank you in advance.

I would like to know if there is a way to have a gallery of photos open in a lightbox from a button. (I have my link in the private content below.)
Is there a way to click on the button labeled “PHOTOS” and have a bunch of photos from the media library load into a lightbox?

Similar to this screen shot: http://ridebdr.jameshowardhosting.com/wp-content/uploads/2018/05/lightbox-modal.png

Any help would be very much appreciated!