NMAT by GMAC Results are declared at this point. NMAT 2018 was held in 75 days test window for example from October 4 to December 17, 2018 in CBT (PC based test) mode. The NMAT by GMAC test scores are typically discharged on the official site of NMAT inside 4-5 weeks after the lead of examination. To get to their scores, applicants need to sign into their NMAT by GMAC account. After the declaration of the last percentile, competitor's score will be sent to the establishments that they wish to impart their scores to.