Final answer:
Physical abuse resulting in Great Bodily Injury must be reported immediately by professionals such as teachers and law enforcement to child protective services or local law enforcement to ensure the child's safety.
Step-by-step explanation:
When physical abuse results in Great Bodily Injury (GBI), it is mandatory for certain professionals, including teachers, law enforcement personnel, and social services staff, to make a report. These reports should be made immediately, or as soon as practicably possible, to local law enforcement or child protective services agencies. The priority is to ensure the safety and well-being of the child in question. The legal obligation to report such instances of abuse is a key part of child protection laws and is essential for the intervention and protection of the child.