An elevated GGT can be suggestive of liver disease. However, since other diseases can raise the GGT (i.e. pancreatitis), you should look at the other liver enzymes (ALT, AST) which are more specific to the liver.
Medications and alcohol certainly can raise the GGT. Repeating the enzymes after cutting down on alcohol should be considered to ensure the enzymes aren't rising.
You can also consider a liver ultrasound as well as blood tests for hepatitis.
These options can be discussed with your personal physician.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
http://www.straightfromthedoc.com