The World Federation of Neurological Surgeons (WFNS) Subarachnoid Hemorrhage (SAH) Grading has been in use since 1988 and uses GCS scoring and presence of focal deficits to predict prognosis:

• Grade 1: GCS score of 15 without focal deficit
• Grade 2: GCS score of 13 or 14 without focal deficit
• Grade 3: GCS score of 13 or 14 with focal deficit
• Grade 4: GCS score of 7-12
• Grade 5: GCS score of 3-6

Source: Medscape