I've alp 82 ul (upto126), sgot/ast39ul (36), sgpt/alt 46ul (45), gamma GT 47 (43). Causes of elevation and any concern?

Probably not. Would still however get tested for hepatitis, if there are no other reasons, such as alcholol or nedication.
Not much. Your lfts are nearly normal. In the absence of symptoms or drug and alcohol use it is unlikely a cause for concern . A repeat study in several mo is prudent.
Recheck. The cause depends on what your medical history and risk factors are. Since there is only mild elevation of your liver functions, i would recommend that this be rechecked in few weeks. In the meantime, please avoid alcohol and products with acetaminophen. Hopefully this is transient and completely reversible. And always talk to your doctor.