Which one of these two structures is correct? Or can they be used interchangeably?
"Someone of the opposite gender"
"Someone from the opposite gender"
What I try to mean by these phrases is, "Someone who is a member of the opposite sex".
Let me make up some example sentences to provide a better picture in your mind:
"He is always nervous when he is around someone of/from the opposite gender."
"He thinks he can't be friends with someone of/from the opposite gender."