From The Truth About Guns:

Pay attention to the woman’s background. This is where social media is a big help. 
I hate to use the word “stereotyping,” but if your lady friend is a big Bernie fan and lists her dream job as being a diplomat at the UN, it’s probably not the wisest approach to take her for a first date to the gun range.
But be careful not to fall into the trap of associating geography with anti-gun sentiment. I dated a girl from New York City who didn’t mind me owning guns at all. And I’ve met more than a few from red state America who support The House of Feinstein.