The 22-year-old Gilliland from Sherrills Ford, North Carolina, spent his final off-weekend period from the NASCAR Cup Series by celebrating a Truck Series victory at Knoxville, Iowa.
The Shoreham, Vermont, native is primed to claim a milestone achievement in his fourth full-time season as a NASCAR Xfinity Series crew chief for JR Motorsports.
Anthony Alfredo, Jeb Burton and Brett Moffitt will represent Our Motorsports for the 2022 NASCAR Xfinity Series season, beginning at Daytona International Speedway in February.
With just one race left before the Championship 4 event at Phoenix International Raceway, Truck Series drivers and teams were vying for the final two spots in the Playoffs.
Grant Enfinger, who was in a must-win situation, held off his ThorSport teammate Ben Rhodes to claim his spot in the Championship 4 by winning the NASCAR Hall of Fame 200.