GML, or GameMaker Language, is a scripting language used in the GameMaker Studio game development environment. It allows developers to create games by writing code that controls game mechanics, graphics, and user interactions. GML is designed to be easy to learn, making it accessible for beginners while still offering advanced features for experienced programmers. GML is primarily used for 2D game development and supports various programming concepts, such as variables, functions, and control structures. It enables developers to create complex game logic and customize their games, providing flexibility in design and functionality.