You are right, but with Dakssh making a sudden decision to quit by 25th Jan, I guess the writers couldn't think of anything but sending Gaurav abroad.
The creatives could have done a lot with Gaurav's story. The story focused on Adi-Brahma-Dev-Priya for a while, so I guess the character got sidelined, which Dakssh wasn't too happy about, so he quit. But, Dakssh is correct that his character did not develop since he came out to members of the family. Had Dakssh stuck around for a bit, I am sure the creatives would have found ways to show other aspects of Gaurav's life, given the show now has 6 more months.
Dakssh is a great actor, but I think they should find a new actor to play Gaurav's part (but the show only has 6 more months, so they probably won't do that!) Looks like this was the end of Gaurav-Karan's story, hope more such stories will follow in new shows. Very sad to see it end abruptly!