Are killua and gon gay
Killua is definitely in love with Gon, he is Killua’s everything. He expressed a couple times throughout Season 5 that Gon was the most important person to Killua in the world and ‘is his light’.
There is no proof whatsoever that Killua is actually gay in Hunter × Hunter. The only male character he has some feelings for is Gon, and most of the theories are based on their relationship.