User blog comment:Brandon Rhea/How FANDOM's mobile skin has changed in 2018/@comment-33359237-20180828121115/@comment-20644-20180829160418

That's a tough one. I definitely understand that specific need, but at the same time mobile lends itself to a vertical scrolling experience. So there's no way to specify that a gallery should be displayed in the old layout, and I don't think the product could be changed to accommodate this particular use case.

That being said, if a user clicks the first image it will open a lightbox where everything is in order and they can scroll through each image sequentially. It's not perfect, but it's a pretty decent solution given the limitations of mobile viewing vs desktop. You could even add a note to the page section saying something like "When viewing on mobile, click the first image for the best view" or however you want to word it.