Certification Pursuant to Rule 30a-2(b) under the 1940 Act and Section 906 of the Sarbanes-Oxley Act
I, Bruce N. Alpert, Principal Executive Officer of GAMCO Global Series Funds, Inc. (the “Registrant”), certify that:
| 1. | The Form N-CSR of the Registrant (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and |
| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. |
Date: 3/08/2017 | /s/ Bruce N. Alpert | |||||
| Bruce N. Alpert, Principal Executive Officer |
I, Agnes Mullady, Principal Financial Officer and Treasurer of GAMCO Global Series Funds, Inc. (the “Registrant”), certify that:
| 1. | The Form N-CSR of the Registrant (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and |
| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. |
Date: 3/08/2017 | /s/ Agnes Mullady | |||||
| Agnes Mullady, Principal Financial Officer and Treasurer |