A script implemented in the GDScript programming language, saved with the [code].gd[/code] extension. The script extends the functionality of all objects that instantiate it.
Calling [method new] creates a new instance of the script. [method Object.set_script] extends an existing object, if that object's class matches one of the script's base classes.
If you are looking for GDScript's built-in functions, see [@GDScript] instead.