All the Ginis you ever wanted!  
Combined Gini data from Luxembourg Income Study (suffix LIS), Socio-Economic Database for Latin America (suffix SEDLAC), World Income Distribution (suffix WYD; the full data set is available), World Bank Europe and Central Asia (suffix EE) and WIDER (suffix W) databases; with their key dummies (net/gross, income/expenditure, household/individual). More than 1500 consistent Gini values from 154 countries and covering the period from 1950 to 2008.