Typically, 50-60 students from a batch of about 450 at IIM Lucknow go abroad for an exchange term. At IIM Lucknow, it's known as the Student Exchange Program, or simply Stex. IIM L does not have affiliations with many prestigious business schools around the world. It has no affiliations with any schools in North America, with the exception of one or two in Canada. The majority of the schools with which it has collaborations are of average or poor quality in Europe.
So, either you should have a stellar profile, including your GPA in your first year at IIML, to get into a good school for Stex, or you should consider going to Stex for a three-month Europe tour with a complimentary term abroad to bring back some credits after you are done vacationing in Europe. If you're looking for good exchange programs, you should probably look into better B-schools in India like IIM A, B, C, or ISB.