Ancillaries are generally fulfilled within a few hours of receiving the fulfillment request. There are cases though where Gordian agents need to call an airline in order to fulfill bookings. Due to airline call centers only being opened certain hours and long wait times, fulfillments can take up to 48 hours.
Bridging your GDS credentials is recommended to help speed up the fulfillment time. Please see the Getting Started Guide for more information on bridging credentials.