Gorce earned a law degree in 1979, then graduated from Sciences Po in 1981 and from ENA in 1987 alongside future National Assembly colleague Christian Paul.

During he second term, he and Jean Leonetti co-chaired the information mission on end-of-life support, which led to the unanimous adoption of the Law on the rights of patients and the end of life by the National Assembly.

[3] Still supporting Ségolène Royal at the 2008 Reims Congress, he returned briefly to the leadership of the Socialist Party (as national secretary of the PS responsible for exclusion), before leaving it definitively a few months later.

In 2009, he opposed the bill aimed at liberalizing internet gambling, judging the opening of this market to be inappropriate, in particular for reasons of public health.

In September 2009, he rejoined the Foreign Affairs Committee of the National Assembly, while remaining vice-president of human rights organization Socialist Related.

In 2011, denouncing the lack of preparation of the Socialist Party program, he decided not to join the campaign team of candidate François Hollande.