Enable GPG signing by default:

```bash
git config --global commit.gpgsign true
git config --global gpg.program (Get-Command gpg).Source

git config --global --unset gpg.format 

gpg --list-secret-keys --keyid-format=long
git config --global user.signingkey B862284A2975BD3B!
```

Install GPG for Windows:

```bash
winget install GnuPG.Gpg4win
```

Import the private and public keys:

```bash
gpg --import .\B862284A2975BD3B.gpg
```

> Note, that for me, my primary key is `DC85D5DF95F8694`, so the above command is importing my sub-key private key `B862284A2975BD3B`.