Hello there!
Greetings!
Last year marks required in neet for a seat in King George's Medical University, Lucknow for obc category student under U.P state quota was 575 marks. But cut off marks for Medical Colleges keeps changing depending upon several factors like number of students that appeared in the exam, kind of marks scored by students, toughness level of exam etc.  So , if you want to get a seat in King George's Medical University, Lucknow you should try to get between 580-600 marks in neet.
Thankyou