The 2020 Lexus GS 350 is available as a 4-door, 5-seat sedan. Starting at $51,395, the 2020 Lexus GS 350 Base RWD is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 28-mpg on the highway. The top of the line 2020 Lexus GS 350 F SPORT Black Line AWD, priced at $55,155, is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway.