For admission in PG courses in institutes such as IITs, NITs, NITIE, one would require to possess an official and valid GATE score. The acceptance/validity of the GATE score is mentioned on the GATE scorecard. It is usually up to 3 years. To this extent, one is eligible to apply for NITIE, IITs, and NITs.

For instance, if you appeared for your GATE examination in 2020, the officiality and validity of your GATE score would extent till 2023, i.e., 3 years. Hence, with that GATE scorecard, you may apply for admission in 2020, 2021, and 2022 as well.

At NITIE, the GATE score card is valid only for two years, it would be better to check the criterion before applying for it. If it is not accepted then you might have to appear for GATE again.