1.Activate VRAY RT GPU.
2.Create a new group consisting of objects (CTRL+G)
3.Try to add the newly made group to the right column in Material Override > Override Exclude in the v-ray RT active shade tab.
Vray GPU does not update. IF you go to production render and update it there, sometimes the GPU will update, and sometimes max will crash.
Also when 3dsmax is closed and reopened the list of items in override exclude in active shade is forgotten and you have to reassign them to the right column.