This is for Nestorlinks
If you have a new pistol, and your gf is anti-gun there are going to be issues. Find out why she's the way she is. Sometimes people develop views based on their experiences. There's a big difference between reflexive ignorance (fear of the unknown), and a time when her brother was shot by a rude poacher.
If it's fear and ignorance, this is your chance. Borrow a .22 Revolver and a semi-auto and offer to teach her the basics. This is a tool, recite the three rules of firearm ownership and then emphasize the safety. Let her handle the guns, let her dry fire the guns. After you have done this, take her to the range, use the same guns you taught her on and have her apply the basics. Ask the range staff for an isolated stall, and try not to be near rifles if they are allowed. I start my newbies on a .22 Revolver, then a .32 Revolver, then a .38 SPL. Some want to jump right into the autos, where I have them shoot a 9MM, and then a .45 pistol. I have found that most tend to settle on the 9MM / 38 SPL cartridges. Get a couple of large targets and have her pump some lead into them and tell her that she's doing great. Pay attention to ensure she follows the rules safely too.
After you teach her the safety aspects, show her how the gun is / will be stored. You should have either a safe of some kind, a locker of some kind, and possibly a trigger lock (which I wouldn't recommend.) Keep the gun in the safe unloaded at first and then go from there. She should also know how to make a gun instantly safe, and have the ability to load and unload one as well.
It's a steep curve, but once she gets over the fear, you might have created a monster. Patience and understanding are the keys to this. Remember that and you might have a convert whose enthusiasm outmatches yours.