Have a look at the publications mentioned below:

Malakar, K., Mishra, T., & Patwardhan, A. (2017). Inequality in water supply in India: an assessment using the Gini and Theil indices. Environment, Development and Sustainability, 1-24.

Chatterjee, A., Ghosh, A., & Chakrabarti, B. K. (2017). Socio-economic inequality: Relationship between Gini and Kolkata indices. Physica A: Statistical Mechanics and its Applications, 466, 583-595.

Mishra, A. K., & Parmar, V. M. (2017). Changing Contours of Income Stratification and Decomposition of Income Inequality: Evidence from Recent Longitudinal Survey in India. Journal of Quantitative Economics, 1-28.

Malakar, K., Malakar, K., Mishra, T., & Mishra, T. (2017). Application of Gini, Theil and concentration indices for assessing water use inequality. International Journal of Social Economics, 44(10), 1335-1347.

Radhakrishnan, K., Marimuthu, R., Rajakumar, M., & Qureshi, N. W. (2017). Inequality of income, asset and debt of inland fishers in the Theni District of Tamil Nadu, India. INDIAN JOURNAL OF FISHERIES, 64(2), 105-111.

Shaw, A. (2017). Metropolitan Governance and Social Inequality in India. In Inequality and Governance in the Metropolis (pp. 57-76). Palgrave Macmillan UK.

Chaudhuri, S., & Roy, M. (2017). Rural-urban spatial inequality in water and sanitation facilities in India: A cross-sectional study from household to national level. Applied Geography, 85, 27-38.

Hans G.P. Jansen Gini's coefficient of mean difference as a measure of adoption speed: theoretical issues and empirical evidence from India, Elsevier Agricultural Economics Year:1992 Month: Day: Volume:7 Issue:3-4 First page:351 Last page:369

Joe, William; Mishra, Udaya S.; Navaneetham, K. Inter-Group Inequalities in Child Undernutrition in India: Group Analogue of the Gini Coefficient and Atkinson's Index Informa UK (Taylor & Francis) Oxford Development Studies Year:2013 Month:06 Day: Volume:41 Issue:2 First page:239 Last page:257

This is very technical question that you can find it easily... via online resources

May be this article will provide some answer to the question.

World Bank gives the Gini Coefficient of income inequality for different countries. However, for India there is no update

https://data.worldbank.org/indicator/SI.POV.GINI?end=2015&locations=IN&start=2015&view=map

Thank you.