This study critically reviews the Gender Inequality Index (GII), the new gender-related index proposed by the United Nations Development Programme (UNDP) in the 2010Human Development Report, arguing that its particular construction limits its usefulness and appropriateness as a global gender inequality index. In particular, the functional form of the index is excessively and unnecessarily confusing. Moreover, the inclusion of indicators that compare the relative performance of women vis-à-vis men, together with absolute women-specific indicators, obscures even more the interpretation of an already complicated index and penalizes the performance of low-income countries. In order to overcome some of the identified limitations, this contribution defines a new composite index of gender inequality that incorporates the GII variables but uses a much simpler functional form. The results suggest that great caution should be exercised when interpreting and using the values of the GII.To view the full text of this article or book review, please see our instruction on accessing the publisher's website.