The GATE score is calculated using a normalization process when the exam for a particular subject is conducted in multiple sessions. Raw marks obtained by candidates are first converted into normalized marks to account for variations in difficulty levels across sessions. These normalized marks are then used to calculate the GATE score using a standardized formula. The score reflects the relative performance of candidates compared to others in the same subject. The scorecard typically includes the candidate's marks out of 100, GATE score out of 1000, All India Rank (AIR), and qualifying marks for different categories.