The gravity gun from Half-Life allows players to manipulate their environment creatively. It has inspired mods in various games, including Minecraft. A creator named 'Aero' has developed a 'Gravity Stick' in Vanilla Minecraft using console commands, which enhances gameplay without third-party add-ons. To create the Gravity Stick, players need to spawn a Command Block with specific parameters and activate a command that allows them to teleport entities. Aero's video demonstrates various commands for altering character size, spawning TNT trails, and equipping mobs with items.