[2] He first entered the Assembly of French Polynesia in November 1999 as a replacement for Alexandre Léontieff, who had been convicted of corruption.

[3] Following his election he controversially installed a crucifix in the Assembly, resulting in the Greens leaving the Union for Democracy coalition.

[9] Following Oscar Temaru's re-election as President of French Polynesia in September 2007 Géros joined his cabinet as Vice-President and Minister of Finance.

[12] Two days later a power-sharing agreement with Tahoeraa Huiraatira saw Gaston Flosse re-elected as President,[13] with Géros joining his cabinet as Lands Minister.

[20] Following the unseating of Édouard Fritch for corruption in September 2014 he again stood unsuccessfully for Assembly President, losing to Marcel Tuihani.

[22] Following the unseating of Oscar Temaru for breaching election campaign rules, he became leader of the Tavini Huiraatira in the Assembly.