Your GGTP levels are very very high and it is definitely a cause for concern.
Although chronic alcoholism
can cause high levels of GGTP but in addition you must have elevated SGOT and SGPT levels.
If your SGOT and SGPT levels are normal then it could mean cholestasis
and then you should have high bilirubin
along with high GGTP.
The cholestasis could be due to the blockage of bile duct which can occur due to many reasons including cancer pancreas.
You must get a CT scan of abdomen done.
Consult a gastroenterologist
as early as possible.