Yes, conditions like autoimmune disease, MUGS, multiple myeloma can raise the globulin
levels.
In your case, chances of autoimmune disease are more as other
blood tests are normal. The only other finding is low folate. Low levels can be due poor intake of folic acid rich food (green leafy vegetables, yellow fruits, avocado, beans, lentils, cauliflower etc) or due to malabsorption syndromes (IBS, tropical sprue, Crohn’s, celiac etc) or due to eating disorders causing malnutrition.