On January 22, 2015, Gordon announced that 2015 would be his last season as a full-time driver, but did not rule out retirement entirely. He started the season by winning the pole for his final Daytona 500, but crashed on the final lap, finishing 33rd. Gordon won two additional poles by sweeping the Talladega races. In November, Gordon claimed his first win of 2015, winning his ninth career Martinsville race in the Goody's Headache Relief Shot 500, advancing him to the Championship Four at Homestead. This would be his only win of 2015, and his 93rd and final win of his NASCAR career. In his final race as a full-time competitor at the 2015 Ford EcoBoost 400, Gordon finished 6th, falling just short of his quest for the fifth championship of his career.
When Gordon made the decision to step back from full-time driving at the conclusion of the 2015 Sprint Cup Series season, he reportedly put out feelers to television networks about the possibility of joining the broadcast booth. On January 25, 2015, USA Today writer Jeff Gluck reported that Gordon was hired by Fox Sports to work as a guest analyst for NASCAR on Fox broadcasts of Xfinity Series events alongside full-time announcers Adam Alexander and Michael Waltrip; the news was officially announced by Fox Sports the following day. On February 3, Gordon made a guest appearance on the Fox News Channel morning show Fox & Friends, where he stated his plans to call three races for Fox Sports.
On April 10, 2015, Gordon made his broadcasting debut on Fox Sports 1 during the network's coverage of the O'Reilly Auto Parts 300 at Texas Motor Speedway. Gordon returned to the broadcast booth for the Drive to Stop Diabetes 300 at Bristol Motor Speedway on April 18, and the Winn-Dixie 300 at Talladega Superspeedway on May 2. Gordon was one of five active NASCAR drivers to serve as a guest analyst for Fox Sports during the 2015 Xfinity Series season; the other four were Kevin Harvick, Brad Keselowski, Clint Bowyer, and Danica Patrick.
On May 21, 2015, Gordon announced on NASCAR Race Hub that he would join Fox Sports as a full-time analyst for Cup Series events, beginning with the 2016 Sprint Cup Series season. Gordon was paired with Mike Joy and Darrell Waltrip in the broadcast booth, replacing Larry McReynolds, who moved to the Hollywood Hotel.
On November 6, 2015, Gordon joined Joy and Waltrip in the booth for the first time at a dress rehearsal during the WinStar World Casino & Resort 350 at Texas Motor Speedway. The rehearsal was not shown during the Camping World Truck Series broadcast. Following his final scheduled race as a driver on November 22, Gordon quickly began the transition into his full-time role at Fox Sports.
Early in his career, Gordon stated that he was a born again Christian. He talked about how in the early-1990s he became curious about Christianity and followed some drivers to the weekly chapel one week, which is how he first started to learn more about God. During this time, Gordon kept verses of the Bible taped to his steering wheel. By 2004, Gordon stated he had "a difficult time focusing on one particular faith." When asked again about his faith in a 2015 Sports Illustrated magazine interview, Gordon stated: "I wasn't brought up [with religion]. It was something I got introduced to when I came into the Cup Series. I explored it and learned a lot from that experience. I feel it's helped make me a better person, but I choose to do it more privately now."
On February 12, 2015, Gordon was hired by sponsor Axalta Coating Systems as global business advisor, working in the automotive refinishing, OEM, commercial vehicle and industrial business departments.
On September 27, 2015, at New Hampshire, Gordon started his 789th consecutive race, becoming NASCAR's iron man, passing Ricky Rudd, who started 788 consecutive races from 1981–2005. Gordon ended his career with 797 races consecutively started.