The GSSB meets over 30 Saturdays, from September to May from 9:30 -12:30 at Diamond Middle School, 99 Hancock Street, Lexington, MA . There are 43 faculty teaching 470 students enrolled in 38 different classrooms, ranging from Preschool to 12th grade.
School Statistics 2016-2019
| 2016/17 | 2017/18 | 2018/19 | |
| # of Students | 424 | 437 | 470 |
| Returning Students | 330 | 349 | 407 |
| # New Students | 94 | 88 | 63 |
| # of Families | 265 | 283 | 304 |
| # of Classes | 34 | 37 | 38 |
| Faculty | 37 | 40 | 43 |
| Returning Faculty | 29 + 8 new | 34 + 6 new | 34 + 9 new |
Exams and Certifications 2015-2018
| Exam | 2015/16 | 2016/17 | 2017/18 |
| AATG National German Exam, Levels 2, 3, 4 (grades 6+) | 122 | 120 | 121 |
| IVA Level A2 (grade 8) | 37 | 20 | 22 |
| DSD Level 1 (grade 9 or 10) | 32 | 27 | 22 |
| DSD Level 2 (grades 10-12) | 10 | 10 | 17 |