/ Dictionary / Index G gDNA: Meaning and Definition of Find definitions for: gDNA Pronunciation: [key] genomic DNA. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gdn GDP Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language