What is a GA allowed and not allowed in netball?

In Netball, a Goal Attack (GA) is allowed to shoot for goal and must work closely with the Goal Shooter (GS) to create scoring opportunities. The GA can move in both the attacking and center thirds of the court but is restricted from entering the Goal Circle when not attempting to shoot. The GA is not allowed to enter the defensive third of the court, and they must adhere to the rules regarding contact and obstruction while defending.