The Lexus GS is an executive car manufactured and marketed by Lexus across four generations — launched in 1991 as the Toyota Aristo in Japan and as the Lexus GS for markets outside the Japanese market beginning in February 1993. It continued with the Toyota Aristo name for the Japanese market until January 2005.

Lexus is the luxury vehicle division of the Japanese automaker Toyota Motor Corporation. The Lexus brand is marketed in more than 90 countries and territories worldwide and is Japan's largest-selling make of premium cars. It has ranked among the 10 largest Japanese global brands in market value. Lexus is headquartered in Nagoya, Japan. Operational centers are located in Brussels, Belgium, and Plano, Texas, United States.