Indian Institute of Management Kozhikode selects applicants for PGP programme through CAT examination, so for your general idea here I am giving CAT exam cut off marks of past year 2015:

Category CAT Score Percentile Sectional Percentile
GEN 90 80
OBC (NC) 80 70
SC 65 50
ST/ DA 55 40

Other admission details for PGP programme are:

PGP programme

IIM Admission Process is a two-step process

Common Admission Test –CAT, and
Personal Interview (PI) and Written Ability Test (WAT)

Eligibility:
The applicant should have a bachelors degree from any recognized University.

For detailed info here is attachment for IIMK PGP admission cut off:

IIMK PGP admission cut off