It may have been suggested before but I think it would be a nice idea. We have a pet spotlight, why not a gallery spotlight?? I know people who work really hard on their galleries and honestly, we do it for no other reason than because were a bunch of item hoarders. What if we could let some of these galleries be shown off to reward some of us for our hard work on them? Perhaps they could be judged similar to pet pages in terms of theme and items in the gallery.
I don't have specifics but I thought it might be a nice idea since the gallery option is more often used as a hoarding place for people who want to clean out their vaults (I myself am guilty of having a hoarding gallery haha)

Staff barely has the time to take care of the pet spotlight, we don't need more spotlights

I spent years trying to win the gallery spotlight on Neo, but galleries don't have nearly the same impact over here.

You can't organize them however you want to and you can't make up a spiffy lookup for them. At least I don't think you can, I don't think I've ever seen one. There really just wouldn't be much to differentiate one gallery from another really.