Nyora kupfuurira kweiyi ndima - Yakagadzirwa kubva kuQuebec Major Junior Hockey League (QMJHL) 22nd yakazara muna 1998
, Gagné akatamba mukuru mudiki neBeauport Harfangs neQuebec Remparts kwemwaka mitatu. Akatanga basa rake reNHL neFlyers muna 1999 uye akatumidzwa zita reNHL All-Rookie Team. Iye akaonekwa muna NHL All-Star Games maviri uye akahwina maviri Bobby Clarke Trophies pamwe Flyers sezvo chikwata MVP.