I don't think they'll ever explicitly make Gncy canon. They might give them hints, but won't declare anything official. Chu said not all of the voice lines in game are canon and back in April, he said the characters were too married to their jobs to be dating each other. And Blizz is aware of the popular ships (and Gncy isn't one of them) so it makes sense to leave Pharmercy and Genyatta alone. Plus, Kaplan likes Pharmercy, so that has to count for something.
this is the nicest anon I’ve ever received thank you for this blessed information!!!! it’s probably v obvious, but I’m an overwatch baby (I’ve been here for like…two months? damn?) so I don’t know shit like this thank you for telling me!!! you are a very cool person anon I’m gonna say thanks a third time because it fills my lil lesbian soul with joy to know this :’)
(also if you want to come off anon I will give you a huge high five for filling my morning with this quality content)