software recommendation – Starting with gpg under macOS

I’m a Linux/Windows user but in the near future, I might have to support users running macOS on questions related to file encryption/decryption using GPG. I have to provide support without having my own macOS to try… I don’t need to know the details, but I would appreciate it if someone could throw a few program names to help me get started on my reading. Of course, Google returned some options, but I can’t tell based on a web page if that is “the” most common way for macOS users.

My understanding so far is that within macOS’ terminal, I can run the gpg command which is part of OpenPGP. Is this standard on any “recent” Mac or does a specific software package have to be installed?

I came across the GPG Suite which is commercial with a 30-day trial. It seems that this is gpg with a GUI interface, GPG keychain, etc. How is this option? Is it common? It seems equivalent in functionality to the Gpg4win for Windows.

So far, these are the two options for users that I have found. Have I missed anything? And would this be the recommended options for GPG under macOS or am I completely off? Thank you!