At the beginning of the season Chuck and Blair make a pact not to be together until Blair succeeds at Waldorf designs and Chuck takes down Bart. After many failed attempts of taking down Bart, Bart and Chuck end up in a fight. This leads to Bart falling off a building and dying. Blair is the only witness to this event and so Chuck and Blair get married so Blair does not have to testify against Chuck.

Can we conclude that does chuck die in gossip girl season 5?
no