How much in-campus salary is offered at Government Law College, Ernakulam to LL.M. students?

You have to take KLEE entrance exam.

And if you get a high rank in it, like within 60 or something there is high chance to get admission.

There is reservation too.

It is the only way. 

There is no specific mention of a fisheries quota for admission in Ernakulam Law College, however this college  provides reservation quotas as per the Government of Kerala's guidelines, that inclue SC, ST, SEBC.

However if they meet the applicable criteria, they can be eligible.

To get admission to Government Law College, Ernakulam, you must apply thrugh the kerala Entrance Examination for LLB ( for 3 year/ 5 year courses) conducted by the Commissioner for Entrance Examination (CEE), Kerala.

Also you must meet the eligibility criteria and participate on allotment process based on your entrane exam rank.