It totally depends on your accuracy.
Even though you have attempted 151, and if all of them are wrong you would end up -50.

Jokes aside, wait for the results when they publish the rank list as AIIMS is very unpredictable and a score of more than 150 i think will fetch delhi
And approx 135 for others.

But this year as GK was unexpectedly easy, things could change.

Again, its unpredictable and fluctuates from year to year and all the best for the results.