Thirumurugan Gandhi advocates for the democratic aspirations of Eelam Tamils, Palestinians, Kurds, Catalonia, Kashmiris, Western Saharans and Sikhs.
He has represented Tamil civil society in Permanent people's Tribunal for Sri Lanka in Bremen, Germany (2013).
He represented Eelam Tamil people and LTTE that how they were destroyed by International community in side event at the human rights council organised by Association Solidarité Internationale Afrique in Partnership with Association Bharathi Centre Culturel Franco-Tamoul, Association Des Etudiants Tamoules de France, and Swiss Council of Eelam Tamils and Zagros Human Rights Center held on 17 March 2017, 15h00 – 16h30 - Room XXVII UNOG, Palais des Nations.
In July 2018, Gandhi spoke at the 38th session of the United Nations Human Rights Council meeting about the May 2018 Thoothukudi Massacre in Tamil Nadu.
[1][9] He was produced in court the next day, where the police argued that a video of his speech uploaded by the UNHRC instigated hatred among people.
[12] On 24 August 2018, Gandhi was produced in court in a sedition case filed for his criticism of corporate influence in a Facebook video.