There is a new demo in the code sample pack
that shows how to control the LED logo of recent GeForce GTX cards.
The demo is available in the host_api/GEFORCE_GTX_LED/
The GEFORCE GTX LED is managed by three functions in the gh_gml module:
Here is a code snippet in Lua that checks the support of LED logo and sets the illumination to the max (min=0, max=100):
gpu_index = 0 -- first GPU
if (gh_gml.geforce_logo_is_illumination_supported(gpu_index) == 1) then