It's difficult to measure rape statistics across countries. But we know, that if guns were prophylactic to rape, the US should have a disproportionately low statistic. It does not.
And anybody who knows about rape knows that guns are impotent to stop the vast majority. That's because a large portion of rape victims support and protect their attacker because it's somebody they love.
But sure, in an 80s action move fantasy, a woman with a gun is safe I guess.