As far as I am aware there is zero relation to GNU projects, aside from pass requiring GPG. I believe the author of pass is the same fellow who wrote wireguard.
Paired with an encryption key stored in an isolated device like a Yubikey, it makes for a powerfully secure password system — if you like using the command line for your passwords.
I don’t know of any iOS apps that do this, but I now want one.
I suspect rather than suggesting it's a GNU project, OP is creating a sort of portmanteau from GnuPG and pass.
[1] https://www.google.com/search?q=%22gnu+pass%22
[2] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
Pass is available in the repositories of most major distributions. As usual, you can also compile from scratch, but, if you do, take note of the dependencies, especially GnuPG (GPG) [6], which creates encryption keys, and Password Generator (pwgen) [7], which generates random passwords that contain random combinations of upper- and lowercase letters, numbers, and special characters. Without GnuPG and pwgen, you will be unable to set up Pass, much less actually use it.
https://www.linux-magazine.com/Issues/2014/158/Command-Line-...