Hey.

The cut off for admission in King George Medical University, Lucknow  in the previous years for the various categories under the State quota was as follows. Considering this you would require a range of marka around this to have a fair chance.

General- 6,573  572

OBC- 11,401  548  

SC- 89,229  387

ST- 86,941  390

Under the All India quota- 

General- 725  635  

SC- 14,988  535

ST- 43,325  460 

Best of luck!