Hey

Yes it does matter when you passed your 12th standard while taking admission in colleges like BIt or VJTI or VIT during counselling. If you have a drop year they will ask you about it and you will be required to provide a gap year certificate too. It will not matter a lot if the gap was due to drop taken for studying in institutes (preparing for JEE etc) as most students do it. However if the drop was due to any illegal behaviour then it might be a disadvantage.

It all depends on the reason taken for the drop written in the drop certificate.