Other than political career, he has written various essays and novels, such as A Stone Wall House and the Wave Roar (돌담집 파도소리) in 1999,[3] Sultan and Emperor (술탄과 황제) in 2012[5] and so on.

[3] In 2004, he served as the Secretary-General of the GNP and helped the party president Park Geun-hye to revive its support which declined due to the impeachment of the then-President of the Republic Roh Moo-hyun.

[3] Following the victory of the GNP in 2008 election, Kim was nominated as the Speaker of the National Assembly, defeating Ahn Sang-soo.

[10] Prior to the 2020 election, the Liberty Korea Party (LKP) brought him in order to manage the candidate preselection and nomination issue.

He was favourably reviewed for eliminating candidates accused of hate speeches or close to the former President Park Geun-hye.

[11][12] Nevertheless, his controversial decision to eliminate 2 key figures of the party — Hong Jun-pyo and Kim Tae-ho,[13] provoked criticisms in which both of them complained and announced to run as independent candidates.

[14] Following the incident of nominating Kim Mi-kyoon for Gangnam 3rd constituency who had frequently expressed his support of the President Moon Jae-in,[15] he finally resigned from that position.