From Wiki . . .
Gannon is one of few managers in the lower leagues to hold a full UEFA Pro Licence.[2][179][180]
Priding himself on playing flowing football in the lower leagues of the English game, Gannon has repeatedly spoken out against clubs he feels play too physically, and referees he feels do not give his players enough protection.[181] As a manager in England, Scotland and Ireland, his teams have picked up fair play awards.[182][183] He has stated that this fair play approach is based on his belief that it is "good principles that lead to good football".[183]
"My philosophy is good passing football, it is how I believe the game should be played and it brings out the best in players. It inspires them and motivates them to play football in the right manner."
[184]
— Gannon speaking in February 2010.
Gannon has also been called a 'tactical maverick' due to his unusual formations.[185] These formations include 3–4–1–2, 4–3–2–1, 4–1–2–3, and his preferred set-up of 4–2–3–1.[186] He has stated that he prefers formations that use four lines of players (as opposed to three lines in the classic 4–4–2) due to the added depth in defence and presence in midfield, and was inspired to use the formations by Carlo Ancelotti.[186] He has also stated that he prefers the 4–3–3 formation to the 4–4–2 formation, and has criticised the way he perceives 4–4–2 to be 'ingrained in the culture' of English football.[187] He is known to be extremely thorough and meticulous in preparing his players for games.[188]
Of an outspoken nature, he has had public fallings out with players,[189][190] referees,[191] chairmen,[192] opposition players and managers, and authorities.[193] The Guardian surmised this by saying that "the feeling about Gannon is that it is His Way or the Highway