I just checked the manual of D:OS-EE and the system requirements section says

<quote>
· Graphics: DirectX 11 Compatible GPU
· DirectX: Version 11"
</quote>
Linux is not mentioned.

However, the Linux sys requirements (on GOG) state:
· Graphics: OpenGL 4.x compliant video card

So they really made a port. Cool!
I really hope that Larian does the same for D:OS 2 as well!