She was still alive during the battle, with the revelation of Peter's secret identity making her die feeling betrayed, but Gwen's last thoughts were asking herself what she did to deserve this.
His relationship is short-lived as Peter, under the influence of the symbiote, steals her from Eddie.
Would she be willing to give up, at least temporarily, her full-time dedication to music and touring in order to meet the demands of a Marvel Studios production schedule? Peter takes Gwen down where the police are and Gwen helps him with his web-shooters to go against Electro.