Hi Michael
We regret for the inconvenience caused.
In order to deploy an application that uses the Syncfusion assemblies, the referenced Syncfusion assemblies should reside in the application folder in the target machine, where the .exe file exists. In order to do that, in the References tab of the Solution Explorer, select all the Syncfusion assemblies, and then change the Copy Local property of the Syncfusion assemblies to true, and compile the project.

Now you may see that the Syncfusion assemblies referenced in the project are copied to the output directory along with the application executable (bin/debug/ or bin/release/). Deploy the .exe along with the Syncfusion assemblies found in this location to the target machine. Make sure that these Syncfusion assemblies reside in the same location as the application.exe in the target machine.
Could you please let us know if you want to refer the Syncfusion assemblies from GAC in cilent machine? If so, please follow the below steps and install the Syncfusion assemblies in GAC location of client’s machine.
Note: Deployment application reference is safe if its is application location for execution.
1. Open the Visual Studio 2010 command prompt with administrative privileges(Admin mode)
2. Pass the below arguments.
Arguments:
gacutil -i <assembly name with path>
Example:
gacutil -i "F:\Assemblies\Syncfusion.BulletGraph.Windows.dll"
Please refer the below screen shot for your reference.

3. The given assembly will be registered in the GAC.
Please let us know if you need any further assistance on this.
Regards,
Manivannan S.