zajrzałem do pomocy (po angielsku) i znalazłem to oto o gml:
First of all, when you define scripts. A script is a program in GML. Secondly, when you add a code action to an event. In a code action you again have to provide a program in GML. Thirdly, in the room creation code. And finally, wherever you need to specify a value in an action, you can also use an expression in GML. An expression, as we will see below is not a complete program, but a piece of code resulting in a value.
możecie mi pomóc?