What is difference between saying "지금 나올게요" and "지금 나갈게요"
나올게요, 나갈게요 ..
나올게 .. 나갈게 ..
지금 나온다 .. 지금 나간다 ..

Is there a difference??

Question

What is difference between saying "지금 나올게요" and "지금 나갈게요"
나올게요, 나갈게요 ..
나올게 .. 나갈게 .. 
지금 나온다 .. 지금 나간다 ..

Is there a difference??

Answer

There is a difference. 온다 vs 간다 is equivalent to "I come" and "I go" in english, respectively.

So if you are saying "I will come out" you will use 나올게요 and if you are saying "I will go out" you will use 나갈게요.

Hope that helps explain things a little better :)