Computer Configuration > Administrative Templates > Citrix Components > Citrix Workspace > User experience
Machine
HKLM\Software\Policies\Citrix\ICA Client\Graphics Engine
Use this policy to enable or disable the use of hardware acceleration (GPU) for remote graphics. When not configured the use of hardware acceleration is enabled on non-embedded GPUs. When enabled, Citrix Workspace will attempt to use the client GPU to accelerate the remote graphics. On client devices that do not support this feature it is disabled silently.