Gamba substitute midfielder Marcelinho set up one goal and scored once as Osaka beat Tokyo Verdy 1969 3-0 on Wednesday night at Tokyo Stadium.
Gamba moved up to third place in the J. League Division One second stage standings, staying two points behind leader Jubilo Iwata.
Jubilo took the stage lead with a 1-0 win over Sanfrecce Hiroshima at Iwata Stadium, where veteran Japan striker Masashi Nakayama scored a late winner to send his team back to the top of the standings.