The Triple Monitor Stand GTR S3/S8 is 100% compatible with the GTR, GTR-S3 and GTR S3 Elite chassis, so it also fits your Oplite Cockpit GTR S8 Elite.

The Oplite GTR Triple Monitor Stand is a universal product designed for different monitor sizes and types, but there is no specific indication that it is intended exclusively for the Oplite GTR S3 Elite. - The stand is generally designed for monitors up to 32 inches in size and weighing up to 9kg per arm. - There is no specific compatibility information for the Oplite GTR S3 Elite, but if the device meets the above specifications, it should be compatible. However, it is advisable to check the technical specifications of the Oplite GTR S3 Elite to ensure that it is compatible with the monitor stand.

The adapter is the VESA 100x100, the monitor already comes with it. But you don't need the triple stand, the monitor is only attached to the centre one. This is sufficient Oplite GTR ELITE Single Monitor Stand