The study is aimed to find out the prevalence, risk factors, maternal and fetal outcome of gestational diabetes mellitus. 222 women diagnosed with Gestational Diabetes Mellitus (GDM) for the period of 8 years from Januarys 2003 to December 2010 were taken into the study. Data on maternal and neonatal outcome, patient history and diabetic management were collected and analyzed. Overall prevalence of GDM was found to be 2.1%. Of the affected women, 16.21% were managed with diet alone and 83.79% were received insulin treatment. Increased BMI, weight, marital period and positive family history for Diabetes Mellitus shows definite influence on GDM. 92.80% of women underwent cesarean delivery only 7.20% were had normal delivery. There was no history of macrosomnia, Intra uterine growth retardation and stillbirth. All babies were born normal in health except for hyperbilirubinemia and hypoglycemia which is the conditions may push them to the risk for Diabetes Mellitus and GDM, hence future monitoring for obesity and Diabetes Mellitus will be advisable. We recommend the early screening before 24th week of gestation, for GDM regardless of any other risk factors and those women with increased BMI, age, weight and positive history of diabetes mellitus has to be considered as high risk group. All GDM diagnosed women should be closely monitored for glycemic control for good maternal and fetal outcome.