Gap in b.tech. tech

Hi I have got a call from cgi for 12th Nov but the call letter clearly states to ignore if you have a gap during b.tech.
Should I go and sit for the interview ? I have a gap in 3rf year b.tech please answer asap

hi gap means do u have any backlog and total how many no of years.

I completed my b.tech in 5 years no outstanding backlog

Than Proceed.
All the very best.