Gex or GEX may refer to:
* ''Gex'', a video game series about a gecko with a passion for TV
** ''Gex'' - The original game that started the franchise.
** ''Gex: Enter the Gecko'' - Sequel to the original, Gex's first adventure in 3-D.
** ''Gex 3: Deep Cover Gecko'' - Final game in the series, Gex is joined by model Marliece Andrada in an adventure to defeat Rez once again.
** see Gex (character) for the protagonist of the above video game series.
** List of Gex series enemies and bosses - A list of enemies and bosses that have appeared throughout the series.
* Gex - A commune in the Ain ''département'', France, 5 km from the Swiss border
* GEX - A German stock market index
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