41 CFR § 102-118.245
How does my agency get an assigned set of GBL or GTR numbers?
June 9, 2020
If your agency does not use prenumbered GBL and GTR forms, you may get an assigned set of numbers from:
General Services Administration
Federal Acquisition Service
Inventory Management Branch (QSDACDB-WS)
819 Taylor Street, Room 6A00
Fort Worth, TX 76102
[65 FR 24569, Apr. 26, 2000, as amended at 74 FR 30476, June 26, 2009]