How many marks are required in GMAT to get into FMS Delhi for MBA programme?

First of all, you cannot get into FMS through GMAT. Only CAT Scores are accepted by FMS for admission. 

Although for Foreign Students (FS), you can get in via GMAT. You should score at least 650. 

• FS studying in India are required to write CAT and appear for the interview if shortlisted. 
• Foreign Nationals with Indian degrees but not currently staying in India are required to submit GMAT scores (minimum score of 650) 
• Foreign Nationals with foreign degrees are advised to submit GMAT and TOEFL scores.

The merit list shall be prepared on the basis of the total percentile rank and sectional percentile rank scores declared in the result of the CAT. At least a 50 percentile rank score in each section of the CAT is required by a candidate to qualify for being short-listed in Group Discussion and Interview.