Background: GDM is a high risk factor in pregnancy & is associated with an increased risk of complications for both mother & baby during pregnancy as well as in postpartum periods. Screening & identifying these high risk women is important to improve short & long term maternal & fetal outcomes. Objective: To determine the fetal & maternal outcome and complications in pt presenting with GDM. Materials and Methods: The present cross-sectional observational study was performed at the Department of Obstetrics and Gynecology of the Jalalabad Ragib Rabeya Medical College Hospital, from June, 2018 to November, 2019. One hundren women who are diagnosed to have GDM were included in this study. Results: Complication of the maternal outcome during antenatal periods that 32(32.0%) patients had H/O GDM, 19(19.0%) had preterm delivery, 19(19.0%) had postpartum UTI, 18(18.0%) had pre-celapmsia, 16(16.0%) had UTI, 14(14.0%) had vulvovaginitis, 13(13.0%) had cervical tear, 12(12.0%) had polyhydramnios, 11(11.0%) had PROM and 11(11.0%) had postpartum hemorrhage. Complication of the fetus outcome during antenatal period showed that 19(19.0%) babies were NICU admission followed by 12(12.0%) had hyperbilirubinemia, 8(8.0%) had neonatal hypoglycaemia, 6(6.0%) had respiratory distress infection, 6(6.0%) had congenital anomalies, 5(5.0%) had prematurity, 5(5.0%) had polycythemia and 4(4.0%) had birth asphyxia. Conclusion: Maternal and perinatal morbidity and mortality is increased in women with GDM. Infections, preterm delivery, postpartum UTI, pre-celapmsia, UTI, vulvovaginitis, cervical tear, polyhydramnios, PROM and postpartum hemorrhage were the common maternal complications. Fetal complications include NICU admission, hyperbilirubinemia, neonatal hypoglycaemia, respiratory distress infection, congenital anomalies, prematurity, polycythemia and birth asphyxia most common cause.