Could you explain a little more clearly where you feel this would be useful?
Are you using old search or new search? Is this in the census results only?
A screenshot attached - on the left, using old search, on the right, same search, using new search.
Since the alternate rows are highlighted, to make them easier to see, I'm not sure how or where gender color coding could be used to advantage.
Perhaps I'm not understanding your meaning.
Edit - or do you perhaps means on the interactive viewer for the census (2nd screenshot attached)?