GDD may refer to:
Game design document, a design document specific to video games Gaseous detection device, a technology used with some electron microscopes and similar instruments Global developmental delay, a childhood medical disorder Goal-directed design, a user interface design method developed by software designer Alan Cooper Group delay dispersion (or group velocity dispersion), effect of a medium on an optical signal Google Developer Day, Google promotional events for developers Great Dragon's Dale, a Russian-language video gaming magazine Growing degree-day, a unit for measuring climatic warmth over a period of time Gondangdia railway station, a railway station in Jakarta, Indonesia