Hey.

The Eligibility Criteria for admission in Army Institute of Law, Mohali states that you need to pass class 12th  examination from Punjab School Education Board or any other equivalent examination recognized as such by the Punjabi University, Patiala, and secure a minimum of at least 45% marks. There are no restrictions regarding taking a gap year/ drop year. Hence you seem to be Eligible till you fulfill the other eligibility criteria.

Best of luck!