Crossword clues for the word: GSIX The word GSIX has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for GSIX Showing 1 to 4 of 4 results Clue(s) E.U. alliance E.U. group Germany, France, the U.K., Italy, Spain and Poland, collectively Unofficial EU leaders group