Gon and Killua haven't gotten to hug in the actual canon of the manga, but the stage shows and extras related to it do have some hugs between them!
The first scene (the video and first image) are from the first Hunter Stage last year. The next two images are from the one that just ended recently. I think the first one was from backstage or something, and the second was after the musical ended. The main 4 also all hugged after it ended, but I couldn't find any images of that, sadly--just tweets about it.
Anyway, I just thought it was cute they get to hug in this version at least!
Au where killua gets fired from his high fashion boutique job because he keeps making horrendous outfits for his clients and as he’s packing up, he gets a job offer from Kite to work at Ugly Clothes Inc. Killua is like my clothes are not ugly but goes with and meets Gon, who can’t keep giving clients green monstrosities and sport styled clothing, Kurapika who constantly trying to burn the place down and giving traditional clothing advice to clients, and Leorio who does nothing but suits.