Tuition & Fees

A GSB education is a significant investment in your child’s future. We are committed to building a community of talented, passionate, creative, and thoughtful students from a diverse range of backgrounds independent of financial circumstances.

We encourage any family who needs assistance to apply for financial aid. Our financial aid budget provides awards to eligible families.

"Thank you to our wonderful second grade team and teacher, Mrs. Tuohy, for creating purposeful and detailed lesson plans. Her directions were easy to follow and the assignments were enjoyable. Thank you to the Middle School team and the fifth grade teachers. The use of KnightSite to list assignments, due dates, and mark assignments completed has been a very useful tool. The lessons have been thoughtful and purposeful. Thank you to all the staff at GSB for working diligently for our students."

Current Lower & Middle School Family

Monthly Payment Plan

Monthly, biannual, and annual payment plans are available and managed through Blackbaud Tuition Management, which is activated during enrollment.

Tuition Refund Insurance Plan

Read additional details about the Tuition Refund Plan.

Lower School

Grades one through four | $37,000
School Hours: 8:15 a.m. to 3:00 p.m.

Middle School

Grades five through eight | $42,200
School Hours: 8:15 a.m. to 3:00 p.m.

Upper School

Grades nine through twelve | $47,900
School Hours: 8:15 a.m. to 3:00 p.m.

Early Childhood

Preschool (5 half days)  |  $15,300
Preschool (5 full days)  |  $22,450
Prekindergarten (5 half days)  |  $15,300
Prekindergarten (5 full days)  |  $22,450
Kindergarten  |  $31,000

School Hours
Half Day: 8:15 a.m. to 12:00 p.m.
Full Day: 8:15 to 2:45 p.m.

Additional Fees

Books and Academic Supplies

For books, technology, day field trips, and academic supplies, families should budget:

  • Lower School  - $350
  • Middle School - $450
  • Upper School - $550 (includes yearbook) 

Matriculation Fee

  • For new students upon enrollment - $250 

International Student Fee

  • For international student enrollment - $4,000 


Other Expenses

  • Purchases are billed on a monthly basis as they occur from the GSB School Store, for athletic equipment, overnight field trips, and other incidental expenses.
  • The annual Spring Unit program is billed separately.
"Gill prepared my son academically and intellectually for his post-high school educational experience. My son graduated from Gill with the confidence that he was more than capable of meeting the challenges and rigors of college."

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