Exclude specific gallery from using lightbox

I have quite a few galleries on my site, and I have one page that is a “master” gallery (contains one image from each of the “sub-galleries” and links to them). All of the aforementioned galleries are implemented using WP’s built-in image/gallery functionality. I’m trying to implement some sort of lightbox on the sub-galleries, so that they open the lightbox when an image in the gallery is clicked, but I want the master gallery to only link to the appropriate sub-gallery.

I’ve tried many, many different gallery and/or lightbox plugins, but I can’t find a single one that lets me exclude a gallery from using lightbox. There are some that do it for individual images using rel="", but rel can only be applied to image links, not to the gallery shortcode. I also found several sources that override the actual WP settings (by editing functions.php) to manually add rel to image tags, but this also doesn’t accomplish what I want since it applies rel to ALL image tags.

So, TL;DR, how can I either a) exclude a specific gallery from using lightbox, or b) have lightbox off by default and only enable it for certain galleries?