Crossword clues for the word: GCD The word GCD has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for GCD Showing 1 to 6 of 6 results Clue(s) "2, re 4 and 6, e.g." "3, for 12 and 15: Abbr." "6, to 18 and 30 (abbr.)" "7, for 14 and 35: abbr." Abbreviation in arithmetic. Abbreviation used in arithmetic.