I don't know much about using IACRA, but I've looked up a few sailplanes /gliders in its database. Some are listed, some are not.
Your glider type/model is not in the database.
https://iacra.faa.gov/iacra/AircraftSearch.aspx
Also noted the comment column on most light aircraft,
under IACRA TypeRating; as (Not type rated)
This excerpt from the:
AVS Integrated Airman Certification and Rating Application (IACRA) INSTRUCTION MANUAL
states:
"This instruction manual currently applies to registration, consoles, certification path selection and the Airline Transport Pilot FAR 61, 121 and 135 certification process only."
No part 91 ?
:?: