[7] After he had stepped down, Kuo and Lin Cho-shui proposed that the DPP amend its charter to recognize the Republic of China as Taiwan.

[9] Shortly after Chen Shui-bian's election to the presidency in 2000, Kuo pushed for cross-party alliances and a coalition government to be formed.

[14][15] In his first term Kuo backed a proposal to ban active politicians from owning media outlets and hosting programs.

[17] In his successful December reelection bid, Kuo received NT$26.35 million in political donations, the third highest total of that electoral cycle.

[18] In 2006, Kuo skipped a party debate on China policy in protest, as the Chen administration had announced changes without reaching out to the Legislative Yuan.