Support group for people who didn't get high enough for A-levels and are now deciding gap year (+ resits) or GEM

basically the title, but I've noticed a pattern of posts in this subreddit that were trying to ask for help for this exact dilemma, so I thought maybe people who have been in this situation before could help explain why they made one of these two choices and give advice to other people who are in this very tough situation. thanks! (also dent applicants welcome)