GDD

GDD may mean:


 * Game design document, a design document specific to video games.
 * Gaseous detection device, a technology used with some electron microscopes and similar instruments
 * Geographically Distributed Development
 * Glaucoma drainage device
 * Global Data Dictionary
 * Global Drug Development
 * Global developmental delay, a childhood medical disorder
 * Goal-Directed Design, a user interface design method developed by Alan Cooper
 * Group delay dispersion (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
 * Green Degree Directory
 * Growing degree-day, a unit for measuring climatic warmth over a period of time