RE: Upgrade path from GP 10.00.1061 to GP 18.5
For these type of upgrade paths, it's best to go backwards........
--you can upgrade to Dynamics GP 18.5 from GP 16.00.864, per the note we have on this 'Upgrading to Microsoft Dynamics GP' article:
learn.microsoft.com/.../hot_topic_mdgpupgrade_415
--You can upgrade to Dynamics GP 16.00.675 or later, to include 16.00.864, from Dynamics GP 2013/12.00.2230
learn.microsoft.com/.../hot_topic_mdgp2016upgrade_413
--You can upgrade to Dynamics GP 2013/12.00.1295, which includes 12.00.2230, from 10.00.1779 or later.
learn.microsoft.com/.../hot_topic_mdgp2013upgrade_411
So, based on this, you'd want to upgrade from your current 10.00.1061 to 10.00.1779 for GP 10.0.
Then upgrade from 10.00.1779 to 12.00.2230 for Dynamics GP 2013
Followed by upgrading from 12.00.2230 to 16.00.864 for Dynamics GP 2016
Lastly, upgrade from 16.00.864 to Dynamics GP 18.5.xxxx.
The above articles have links to the System Requirements for the various GP versions, as well as links to the service packs and product download pages.
You'll want to also take into account the SQL Server version, as our GP Utilities does look at that version when launched.
Thank you,