A GMAT score is valid for 5 years. Even if you have a 5 year Old Score you can apply with it. As far as your issue is concerned, I believe initially in the MICA Application only your GMAT Score will be asked which you easily get to know poat the test. Howevee do try to take a screenshot and keep that with you until you have the Official Result.

For more details do follow the link below

https://media.careers360.com/articles/micat-application-form