Hi,
I have the same issue - I'm trying to make a gallery with longform captions (which also need formatting within it). Thanks @brandon for the code above - I used it and it is displaying the captions - but it's also duplicating the text.
Some part of the caption now shows up as it's supported by Squarespace 7.1 - but most of it gets cut off. (attached screenshot)
I'm also trying to show entire paragraphs of text with separate headings, and more info displayed on click in a lightbox - is there any other layout block other than Gallery that would be suited for this purpose? Thanks~