# What are the formulas to compute the greeks of a gap option?

I'm having a problem to calculate the gap option greeks since there are 2 different exercise prices K1 and K2. Do you know the answer or where can I read about these particular greeks?

$$(S_T-K_1)\cdot 1_{S_T > K_2} = S_T\cdot 1_{S_T > K_2} -K_1\cdot 1_{S_T > K_2}$$