G.A. Mangus spent seven seasons as South Carolina's quarterbacks coach under Head Coach Steve Spurrier. He added tight ends to his duties in 2014.
In 2014, senior quarterback Dylan Thompson led the SEC and set a school record in yards passing, while throwing for the second-most touchdowns in a single-season in Carolina history. The Gamecocks scored nearly 33 points and gained over 440 yards of offense per game.
In 2013, Mangus mentored senior quarterback Connor Shaw. Shaw set the school record for career wins as a starter and as the all-time leader in completion percentage. He threw 24 touchdowns in his final campaign against just one interception, as Carolina racked up 34 points and a school-record 452 yards of offense per game. Overall, the Gamecocks threw 30 TD passes against just four interceptions in 2013.
Mangus joined the Carolina staff in 2009. In his first season in Columbia he helped Stephen Garcia rank second in the SEC in passing and was third in the league in total offense, behind only Ryan Mallett and Tim Tebow.
His second season saw marked improvement, as Garcia ranked 22nd in the nation in passing efficiency and moved up the Carolina passing charts to third all-time in yards, completions, attempts and touchdowns.
Shaw took over the quarterback duties in 2011 and posted an 8-1 record as the starting signal-caller. The dual-threat QB completed 65.4 percent of his passes with 14 touchdowns and also rushed for over 500 yards with eight scores.
Mangus was responsible for the tutelage of Shaw and Dylan Thompson during the 2012 campaign. The quarterbacks combined to throw 29 touchdown passes while logging just nine interceptions during the season.
Mangus' abilities as a coach spill over into recruiting, as he was named one of the nation's top 25 recruiters by ESPN, Rivals.com and by 247Sports.com in February 2011, and one of the top 50 recruiters by 247Sports.com in `12 and `13.
Prior to Carolina, he was the offensive coordinator/quarterbacks coach at Middle Tennessee State for three seasons under former Gamecock coach Rick Stockstill.
Mangus took over the Delaware Valley program in May 2002, went 2-8 in his first season, and turned the team into an NCAA Division III championship contender. In the next three seasons Delaware Valley notched a 33-4 record, won three conference championships, and advanced to the national quarterfinals twice.
In 2003, Mangus directed the Aggies to the fifth-best one-year turnaround in Division III history. They finished 9-2 and captured the Eastern College Athletic Conference Southeast Championship, earning him Coach of the Year honors.
In 2004 and 2005, Mangus led the Aggies to perfect back-to-back regular-season records and the team's first overall Middle Atlantic Conference championship. The 2005 squad also earned a MAC title and advanced to the NCAA playoffs. Delaware Valley hosted and won its first two playoff games each season before falling in the quarterfinals, finishing with 12-1 marks.
Mangus was named the league's 2004 Coach of the Year for the second year in a row and earned the East Region Coach of the Year Award from Don Hansen's Football Gazette. Mangus was voted the American Football Coaches Association (AFCA) Division III Region 2 Coach of the Year. His off-season was capped when he was named the Tri-State Coach of the Year by the Maxwell Football Club.
Following his graduation from Florida in 1992, Mangus remained at Florida for three years, as a graduate assistant and assistant offensive line coach. The Gators won two SEC titles (1993 and `94), reached the championship game in 1992 and made three bowl appearances during that time.
Mangus first full-time position came at Widener. He began as the running backs and quarterbacks coach and was eventually elevated to offensive coordinator. The Pioneers had two eight-win seasons and made two postseason appearances, including a spot in the 1995 Division III playoffs.
Mangus became the assistant head coach and offensive coordinator for Ursinus College in June 1999 and joined a program that had gone 3-7 in 1998. The 1999 squad posted a school-record 10 wins, including its first-ever Division III playoff win. The Bears went 8-2 the following year for their first back-to-back winning seasons since 1954.