Apang is the Arunachal Pradesh's longest serving Chief Minister and also the fourth longest serving Chief Minister of an Indian state after Pawan Kumar Chamling of Sikkim,[1][2] Jyoti Basu of West Bengal and Naveen Patnaik of Odisha.

Gegong Apang started his political career as a member of the Congress Pradesh Council between 1972 and 1975 after passing out from JN College, Pasighat.

[7] He was elected leader of the newly formed United Democratic Front, a coalition of his own political party, the Arunachal Congress and several others, in 2003.

Only a few months later, Apang and his supporting MLAs merged with the Bharatiya Janata Party,[8] the first time the BJP had ever ruled a state in north-eastern India.

[10] In October 2004, Congress won the majority in state assembly election, making Apang return as the Chief Minister.

[16] The scam allegedly involves fraudulent hill transport subsidy bills that were paid without the required financial oversight while he was the chief minister.