Grant Naylor was the collective pseudonym used by writers Rob Grant and Doug Naylor for their collaborative work, particularly the cult science fiction comedy series Red Dwarf. This pseudonym was referred to as a "gestalt entity," meaning something that is greater than the sum of its parts.

The collaboration between Grant and Naylor began in the mid-1980s, co-writing BBC Radio 4 programmes such as Cliché and its sequel, Son of Cliché, and television programmes such as the British satire Spitting Image, the office-based comedy The 10%ers, and various projects for Jasper Carrott. The duo is also credited with writing the lyrics to "The Chicken Song" and other musical parodies for Spitting Image.

Their partnership led to the creation of Red Dwarf, with the first three series produced by Paul Jackson's company. Grant Naylor Productions was established in 1990 as the production company for the show, a joint venture between Naylor, Grant, and Noel Gay Television.

In the mid-1990s, after the sixth series of Red Dwarf, Grant left the show, ending the collaboration with Naylor. However, Grant Naylor Productions continued, and later series of Red Dwarf were written by Naylor, sometimes in collaboration with other writers.

Despite attempts to create a feature-length adaptation of the show, sufficient funding was not secured. Instead, a new three-part television miniseries, Red Dwarf: Back to Earth, was released in 2009. Subsequent series, Red Dwarf X, XI, and XII were broadcast between 2012 and 2017, with a telemovie released in 2020.

In March 2020, Naylor ceased to be a director of the company due to a legal dispute over Red Dwarf rights, though it was resolved by March 2023.