Can you describe a notable storyline in the GL Comic, such as 'Gray Three'?

'Gray Three' is a pivotal storyline in the GL Comic's history. It depicts a catastrophic event where nearly all Green Lanterns simultaneously lose their connection to the Green Flame, plunging the Corps into chaos and forcing them to confront their deepest fears and insecurities. It's a dark and emotionally resonant story that explores the fragility of the Corps' foundation.