Gerdeka Hartlevsdotter, or Hartlefsdotter, also called Gerdica (1370–1438), was a Swedish Bridgettine nun.
Gerdeka, when abbess, had her father reburied in the abbey graveyard when it became permitted for non-members of the order to be buried there.
Gerdeka was elected abbess in 1403 after the deposition of her predecessor Ingegerd Knutsdotter.
In 1415, she completed the negotiations, and at the wish of the English King sent the nuns Anna Karlsdotter, Christina Finwitsdotter, Christina Esbjörnsdotter and Anna Esbjörnsdotter to England with great festivities, escorted by all the bishops of Sweden, the archbishop and a bishop from Norway, as well as several ambassadors, to found Syon Abbey in England.
In 1419, Vadstena was subjected to an investigation after rumors that not only the abbess Gerdica but also the nuns had received male guests in private and accepted gifts from them.