It all depends on the writer
There's a What if issue Spider-Man saves Gwen instead of snapping her neck, she hated him in one frame and jumped in his arms the next panel
If another might write her, it could take quite some time before she gets over hating Spider-Man, like Bendis did in Ultimate
In the end, Peter picks Gwen before Mary Jane, in Earth X (I think that one) a middle aged fat Spider-Man told his daughter he wish he was married to Gwen instead
I'm voting Gwen