On February 19, 2011, Gibbons appeared as a guest judge at the 5th Annual Misprint Beard and Moustache Contest at the Mohawk Club in Austin, Texas.
In 2011, Gibbons joined with Texas-based Mojo Products, LLC, to launch a line of hot sauces, barbecue sauces, and other products with his own personal branding, "BFG Brand". The sauces were sold as BFG No. 44 via his personal website.
Gibbons is an avid car collector and custom car enthusiast with an extensive collection that includes a 1948 Cadillac Series 62 (known as CadZZilla), a 1962 Chevrolet Impala (known as "Slampala"), a 1950 Ford Business Coupe, and a 1958 Ford Thunderbird. One of his earliest custom cars, a 1933 Ford Coupe (known as "Eliminator"), was featured in three of ZZ Top's music videos and is also on the cover of their 1983 album, also titled Eliminator. Gibbons also published a book in 2011 about his love of cars and guitars titled Billy F Gibbons: Rock + Roll Gearhead. The November 2014 issue of Guitar World magazine featured an interview with Gibbons and fellow guitarist Jeff Beck about their mutual appreciation of "cars, guitars, and everything in between".