kimchuy said:
Well, I don't think so. Killua is leaving right? He said to Knov, "You take care of the doctors. We'll need them...at least until I come back." So, why would he leave if he would be the one to save Gon?
Killua needs someone who has a medical expertise preferably Nen-user. Well, thinking about it, there are not much friends with Killua and Gon who is a medical expert except...Leorio. So, I'm guessing he would go to Leorio. And, I think it's about time that Leorio will appear in the manga after such a long time (I forgot which chapter did he last appeared.)
I think right now, Leorio has mastered Nen and most probably has a Hatsu that could heal any kind of illness ( or close to that). Well, Leorio did said back at the start of the Hunter Exam that he aspires to become a doctor— one that can cure any illness. So, I think it's not a farfetched idea.
Leorio was my first thought as well. Killua did have his cell phone out and was calling someone. But that would just be Gon's physical state. What about his emotional state? I don't think that just seeing that Kaito has survived will be enough, after all Gon did kill someone and he is a person who truly values life. I mean, obviously, Gon will live. He can't die since he is the main character, so to me, I'm more worried about his emotional state and how Killua will help him there. But who knows, maybe Gon will look at this as a sometimes necessary evil and be just fine.