Which paraneoplastic autoantibodies are commonly seen in conjunction with anti-gad autoantibodies?

Nothing specific: The anti gad antibodies can be seen in stiff person syndrome, rasmussen encephalistis as well as in many patient is type 1 diabetes. Rarely, stiffman person syndrome can be found in patients with breast cancer and hodgkin's lymphoma. But your symptoms are not consistent with sps. I will not rely heavily on the antobody test alone. Go to see neurologist. Check your vit level, etc.