Hi Barbie, Welcome! I am new to The Garden Helper Forum myself.
SINNINGIA speciosa (Gloxinia speciosa)
The long term preservation approach to the In Vitro storage of
seeds and tubers seems to favor Cryopreservation in liquid nitrogen at -196 degrees Centigrade.
There has been extensive studies on the tubers
potatoes and Yams which you could probably peruse and base preservation techniques for short, medium and long term storage of the Gloxinia tuber.
Let us know if this is something you have in mind.
Papito