Display all members of a certain group rank in-game?

Hello there! :slight_smile: So I am trying to achieve the following:
For a staff list GUI I would like to get all members of my group that have a certain rank level and then display the name and avatar image of all of them. I know I could just manually do that, however, I want it to update automatically when someone gets added or removed from that certain rank. I looked that up but basically have no real idea what to do. Thanks for any help in advance!