Here is the Microsoft Product Lifecycle Policy published on Microsoft official site.
https://support.microsoft.com/en-us/lifecycle/search?alpha=Dynamics%20GP
| Products Released | Lifecycle Start Date | Mainstream Support End Date | Extended Support End Date | Service Pack Support End Date |
| Dynamics GP 2015 | 2/18/2015 | 4/14/2020 | 4/8/2025 | |
| Dynamics GP 2015 R2 | 8/30/2015 | 4/14/2020 | 4/8/2025 | |
| Dynamics GP 2016 | 5/1/2016 | 7/13/2021 | 7/14/2026 | |
| Dynamics GP 2018 | 12/1/2017 | 1/10/2023 | 1/11/2028 | |
| Microsoft Dynamics GP 10.0 | 8/4/2007 | Not Applicable | Not Applicable | 1/12/2010 |
| Microsoft Dynamics GP 10.0 Service Pack 1 | 11/16/2007 | Not Applicable | Not Applicable | 10/12/2010 |
| Microsoft Dynamics GP 10.0 Service Pack 2 | 5/28/2008 | Not Applicable | Not Applicable | 1/11/2011 |
| Microsoft Dynamics GP 10.0 Service Pack 3 | 10/15/2008 | Not Applicable | Not Applicable | 10/11/2011 |
| Microsoft Dynamics GP 10.0 Service Pack 4 | 8/14/2009 | Not Applicable | Not Applicable | 10/9/2012 |
| Microsoft Dynamics GP 10.0 Service Pack 5 | 7/31/2010 | 10/9/2012 | 10/10/2017 | |
| Microsoft Dynamics GP 2010 | 6/15/2010 | Not Applicable | Not Applicable | 10/9/2012 |
| Microsoft Dynamics GP 2010 R2 | 7/14/2011 | Not Applicable | Not Applicable | 10/9/2012 |
| Microsoft Dynamics GP 2010 Service Pack 1 | 12/16/2010 | Not Applicable | Not Applicable | 7/14/2013 |
| Microsoft Dynamics GP 2010 Service Pack 2 | 4/15/2011 | Not Applicable | Not Applicable | 7/8/2014 |
| Microsoft Dynamics GP 2010 Service Pack 3 | 6/27/2012 | Not Applicable | Not Applicable | 10/13/2015 |
| Microsoft Dynamics GP 2010 Service Pack 4 | 9/18/2013 | 10/13/2015 | 10/13/2020 | |
| Microsoft Dynamics GP 2013 | 3/12/2013 | Not Applicable | Not Applicable | 7/14/2015 |
| Microsoft Dynamics GP 2013 R2 | 8/21/2014 | Not Applicable | Not Applicable | 7/14/2015 |
| Microsoft Dynamics GP 2013 Service Pack 1 | 4/18/2013 | Not Applicable | Not Applicable | 10/13/2015 |
| Microsoft Dynamics GP 2013 Service Pack 2 | 8/28/2013 | 4/10/2018 | 4/11/2023 | |
| Microsoft Dynamics GP 2016 R2 | 12/1/2016 | 7/13/2021 | 7/14/2026 | |
| Microsoft Dynamics GP 9.0 | 12/19/2005 | Not Applicable | Not Applicable | 7/10/2007 |
| Microsoft Dynamics GP 9.0 Service Pack 1 | 5/26/2006 | Not Applicable | Not Applicable | 1/8/2008 |
| Microsoft Dynamics GP 9.0 Service Pack 2 | 12/1/2006 | Not Applicable | Not Applicable | 10/13/2009 |
| Microsoft Dynamics GP 9.0 Service Pack 3 | 10/3/2007 | Not Applicable | Not Applicable | 10/12/2010 |
| Microsoft Dynamics GP 9.0 Service Pack 4 | 9/9/2008 | 1/11/2011 | 1/11/2011 |
