Griner sure sounds like a guy. On the other hand, Griner played on a girls’ high school basketball team. And that was before the whole trans thing became an issue.
So I’m guessing Griner is a she. However, her DNA would probably be of some interest to a cell biologist. Because something is a bit off there.
From my research Griner is a he with ambiguous genitalia, intersex like Caster Semenya .