The latest version of GnuPG for OS X is 2.2.23 (released 2020/09/03):
Install.pkg and choose Open option. If you already installed gpgOSX before, simply double click on Install.pkg. The key for verifying the signature can be obtained from https://www.enigmail.net/download/other/Enigmail_public_key.asc
Key Fingerprint: 4F9F 89F5 505A C1D1 A260 631C DB11 87B9 DD5F 693B
2020/08/27: 2.2.22 DMG file
2020/07/11: 2.2.21 DMG file
2020/03/21: 2.2.20 DMG file
2019/12/18: 2.2.19 DMG file
2019/11/26: 2.2.18 DMG file
2019/07/10: 2.2.17 DMG file
2019/05/30: 2.2.16 DMG file
2019/03/27: 2.2.15 DMG file
2019/03/22: 2.2.14 DMG file
2019/02/13: 2.2.13 DMG file
2018/12/15: 2.2.12 DMG file
2018/11/07: 2.2.11 DMG file
2018/08/31: 2.2.10 DMG file
2018/07/13: 2.2.9 DMG file
2018/06/04: 2.2.8 DMG file
2018/05/03: 2.2.7 DMG file
2018/04/14: 2.2.6 DMG file
2018/02/23: 2.2.5 DMG file
2017/12/21: 2.2.4 DMG file
2017/11/22: 2.2.3 DMG file
2017/11/07: 2.2.2 DMG file
2017/09/21: 2.2.1 DMG file
2017/08/29: 2.2.0 DMG file
2017/08/10: 2.1.23 DMG file
2017/07/29: 2.1.22 DMG file
2017/06/29: 2.1.21 DMG file
2017/04/04: 2.1.20 DMG file
2017/03/03: 2.1.19 DMG file
2017/01/24: 2.1.18 DMG file
2017/01/07: 2.1.17 DMG file
2016/11/19: 2.1.16 DMG file
2016/08/19: 2.1.15 DMG file
2016/07/16: 2.1.14 DMG file
2016/06/18: 2.1.13 DMG file
2016/05/18: 2.1.12 DMG file
2016/02/10: 2.1.11 DMG file
2015/12/10: 2.1.10 DMG file
2015/10/12: 2.1.9 DMG file
2015/09/11: 2.1.8 DMG file
2015/08/12: 2.1.7 DMG file
2015/07/15: 2.1.6 DMG file
2015/06/13: 2.1.5 DMG file
2015/05/13: 2.1.4 DMG file
2015/04/12: 2.1.3 DMG File
2015/02/12: 2.1.2 DMG File
2014/12/17: 2.1.1 DMG File
2014/11/09: 2.1.0 DMG File