Hi,

Gap certificate would be needed if you have gap after completing your class 12. See, for getting admission into the College, what usually is seen the year of passing of class 12 and in which year you are applying for the particular course. You do not need to get stressed over it because their is no such gap in your studies as you have done polytechnic course directly after completing your class 10. The study is in continuing and the gap certificate is usually needed if their is gap in studies after completing your class 12 for getting admission into the college.