Oh my god it's adorable! We have them here too but I've never seen one.
We have them here by the millions. We have a seasonal pond on the property, and a bunch of vernal pools near by, so they are literally everywhere here. There's a couple days in the summer when they finally leave the pond, they are everywhere, and I mean *everywhere*. It's creepy as you'll look at bushes, deck chairs, potted plants, etc and see multiple ones. It's awful too as they get squished by doors, feet, cars... Their call is pretty loud and distinct; guarantee you've heard them. Last summer during the drought, our seasonal pond dried up by July (this year it was wet all summer). The Grey Tree frogs laid in our large tub we usually put pond plants and small fish in during that drought. We watched them mature from tadpole to froglets; pretty neat. I've been tempted to grab some, but just one more thing to care for