CGS Department and Staff Directory
| Automated Directory | 978-722-9051 |
| Main Office | 978-722-9052 |
| Main Office Fax | 978-722-9053 |
| Lower School | 978-722-9054 |
| Lower School Fax | 978-722-9053 |
| Upper School | 978-722-9056 |
| Upper School Fax | 978-722-9053 |
| Counseling Office | 978-722-9058 |
| Special Education | 978-722-9063 |
| Nurse | 978-722-9059 |
| Student Absence Line | 978-722-9060 |
| Media Center | 978-722-9051 x5340 |
| Cafeteria | 978-722-9051 x5235 |
| Head Custodian | 978-722-9052 x5208 |