You know how the trope is how everybody knows Jack and Gabriel are either lovers or want to be lovers? What if nobody knows? Like, you’ve got these two guys who are heading up one of the most important organizations in the world and the covert ops branch of said organization respectively. They’ve got to be awesome at keeping secrets.
Hell, maybe they’re even totally, legitimately married but the right amount of friendly persuasion and vague threats keeps the certificate from the hands of the press. Not that anybody’s looking. Nobody thinks they’d ever be lovers.
That they’re each other’s emergency contact isn’t surprising given their respective positions in life, lack of serious relationships, and friendship.
Then, of course, somebody finds out. Maybe McCree is snooping through Gabriel’s stuff and finds his wedding ring. Maybe Tracer blinks at the wrong time and finds herself warping through time to a point where Gabriel and Jack were making out in Jack’s totally secure office. Maybe some overzealous income tax auditor sees something ‘amiss’ in their respective tax forms, and starts an investigation, so they have to prove that no, they didn’t file wrong.