Ggt of 331 non drinker. other lfts raised. elevated iga?

This is serious: I trust you are not taking some other medication that is doing this to you. You'll be checked for autoimmune hepatitis, primary biliary cirrhosis, hepatitis b and c, sclerosing cholangitis (doubt), hemochromatosis, wilson's and antitrypsin deficiency. If all are negative, which is likely, suspect metabolic syndrome / fitness rx. I would not draw any additional conclusion from the elevated iga.