The Gallery is a tab within each Jump that makes it easy to see all of the images and videos that have been shared in the group. Tap any image to zoom in and tap the comment icon in the top right to see comments and information related to that post.
You will find the Gallery inside each Jump. Scroll to the top of your Jump and look for the row of tabs near the top. Tap on Gallery to reveal the images and videos from that Jump, all in one place.