I currently reside in PA however my girlfriend lives in/resident of NJ. Over the past several months, I've been spending 4-6 days a week at her house. At my home in PA, I have a collection handguns & long guns. I was wondering what the laws are & if it would be legal for me to bring an firearm/ammo to her house when I stay over for home defense? I would transport the firearm unloaded, locked in a GunVault safe in my trunk.

If this is illegal, would I be able to transfer a firearm to her or have her purchase one in NJ and keep it inside of her home?

She gets an FID then you transfer through an FFL. But then if things don’t work out it’s still hers. 

If you have established a residence in NJ there is no reason you can't keep a firearm there as long as it's NJ legal.

Establishing a residence has nothing to do with who pays the mortgage/rent, utilities, etc.  It means you live there a portion of the time.

4 hours ago, BobA said:

She gets an FID then you transfer through an FFL. But then if things don’t work out it’s still hers. 

You can do this and that can happen.

4 hours ago, BobA said:

She gets an FID then you transfer through an FFL. But then if things don’t work out it’s still hers. 

Have her get a FID and get her own. If things don't work out its hers 

13 minutes ago, Bklynracer said:

Have her get a FID and get her own. If things don't work out its hers 

This is good for several reasons:

- I hope you guys are happy and stable, however...if the relationship has problems in the future, you do not have to worry about retrieving one or more of your firearms from her property if you have to suddenly leave.

- Another FID holder means possibly another friend, voter and maybe advocate for the RKBA struggle in NJ.

6 minutes ago, DirtyDigz said:

This is good for several reasons:

- I hope you guys are happy and stable, however...if the relationship has problems in the future, you do not have to worry about retrieving one or more of your firearms from her property if you have to suddenly leave.

- Another FID holder means possibly another friend, voter and maybe advocate for the RKBA struggle in NJ.

I concur with both you & GRIZ.  To the OP:  Welcome to the forum.  Read the EXEMPTIONS & EXCEPTIONS found in NJ gun laws here on this forum.  Operate within them & you'll be fine.  Don't look for permission to do things (such as ownership or transportation) in anything that's not an EXEMPTION or an EXCEPTION.  And you don't need to ask to breathe air, cause it's a GIVEN  

Have her move in with you   imagine the taxes she'll save.  Plus, she'll become a resident of a free state.

Stay in PA. Have her move there. If she won't move to PA now don't get married. Getting a Jersey Girl out of NJ is a monumental task.