The GMAT is offered worldwide through Pearson VUE, a third-party organization which develops and administers the GMAT on behalf of the GMAC and under its direction. According to Pearson VUE, it has a network of over 300 centers in India.
Throughout the year, the Pearson VUE centers are usually open Monday through Friday, in the morning and the late afternoon. The exact availability depends on the centers themselves. Some centers choose to open even on weekends. As of now, Pearson VUE does not offer information about specific centers.