“GNG” usually means “gang” in texting, but it’s not always literal; it’s more like slang for referring to your close friends or group, similar to saying “my people” or “my crew.” Kids use it because it’s short, casual, and comes from social media and hip-hop culture, where these abbreviations spread fast. You’ll see it in messages like “what’s up gng?” which just means “what’s up guys?” or “what’s up friends?”