According to the specs, card stock weight is not included, however, it will handle 110lb index cards, which is no different than card stock. So, my guess is it would based on this fact:
Specs:
U.S. letter-16 to 24 lbs. (60-90 g/m2)
Legal-20 to 24 lbs. (75-90 g/m2)
Envelope-20 to 24 lbs. (75-90 g/m2)
Index card-110 lbs. (up to 200 g/m2)