Gahlot entered politics with the Aam Aadmi Party and was elected as the
MLA for the Najafgarh constituency in the
2015 Delhi elections. He served as a member of both the
Sixth and
Seventh Delhi Legislative Assembly from February 2015 to November 2024. As Transport Minister, he led the implementation of major initiatives such as the
Electric Vehicle Policy, the Pink Pass Scheme for free
bus travel for women, and the Mukhyamantri
Tirath Yatra Yojana. He also focused on women’s safety in public transport by deploying marshals and increasing the recruitment of women drivers. Gahlot played a pivotal role in Delhi’s transition to
electric buses, overseeing the electrification of bus depots and the addition of over 1,000 e-buses to the city’s fleet, modernizing the capital’s public transport system. On 17 November 2024, Gahlot resigned from his ministerial position and the Aam Aadmi Party, citing that the party's political ambitions had overtaken its commitment to
public welfare. He pointed to unfulfilled promises, including the failure to clean the
Yamuna River, which he claimed had become more
polluted, as well as controversies surrounding the "Sheeshmahal scam." The following day, he joined BJP, signaling a significant shift in his political career. Gahlot was elected as MLA from
Bijwasan Constituency in
2025 Delhi Assembly Elections. ==Electoral performance ==