H Yazan,
Sorry for delay in replying.
You can deploy your application without installing Syncfusion WPF assemblies in the GAC. Please follow the steps below that shows how we can deploy the application.
1. Create and add a folder named "en-US" to your application.
2. Copy "Syncfusion.Tools.WPF.Resources.dll" from "C:\Program Files\Reference Assembly"
3. Paste it to "en-US" folder in your application.
4. Set "Copy Always" for "Syncfusion.Tools.WPF.Resources.dll".
5. And also set all the Syncfusion WPF assemblies "Copy Local" property to true.
6. Rebuild the application and you can deploy.
We have created a simple sample to deploy the application without WPF assemblies in the GAC and it is available in the below link.
http://websamples.syncfusion.com/samples/WPF/72965C/main.htmPlease have a look at the above sample and let me know if you have any questions.
Regards,
Asem.