It's better for you that she has her own credit card. You can then stop looking into it and trying to track/see things. Trust me on this, you checking small things such as where she's spending money will only hurt you over time. Let it go. Right now you might think it's harmless but it's preventing you from detaching further.

As for GAL, you can look into geocaching. Something I'm doing right now that not many people know of. All it costs you is gas money and time. This assumes you have a smartphone and a data plan in your phone.

Movies can also be a good plan, going certain days or early hours can be cheap. Just have to see what discounts a theater has.

Walks down nature paths and trails, you can look most up online or just by driving down strange roads you haven't been down before.

However, these are more solo things unless you find someone to go along with.

Accept what is, let go of what was, and have faith in what will be