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