Well, my team might be using their Google Map API.
Same group, so google map api and likely firebase.
Well, Firebase is a part of the Google Cloud Platform, and I think a lot of people will be using it.
However, it's definitely a good question about whether people are using any other features of GCP beyond Firebase.
We will be using the firebase Database and Storage functions to store and retrieve our data for the team project.
I have been working with a few different Virtual Machines in Google Cloud Platform for my individual project. It costs money but between the $50 coupon given by Stonedahl, and $300 credit for new users, it has covered it all.
So far I think my group is just going to be using firebase.
I used GCP storage. It will require your billing address and your card, so just be careful with it