Sorry to say, but the short answer is no. (Unless Kevin knows something that I don't see right now)
Theoretically, you could use something like the NZXT Kraken G12, but mounting the AIO to the GPU would then exceed the maximum graphics card width, so wouldn't fit. At least, I haven't found an AIO which would fit there.
You could flip the fan on your top-down cooler so that it blows upwards. This would be still inefficient, and wouldn't work if you have a powerful CPU, because the radiator would end up trying to cool the GPU using the hot air that comes from the CPU cooler. Maybe the side and back fans could help somewhat, but hard to say without testing.
Not unless you somehow hook up both the CPU and GPU to the same radiator, or mount 2 radiators on top of each other to the top panel. I haven't done the math but it doesn't look like there is space for this. Maybe if you have a DC/DC PSU you could fit something to the place where normally the SFX PSU would go, but I wouldn't bet on this either. Also if you have a GPU that you wanna watercool, it probably draws more power than a DC/DC PSU can provide reasonably.
I think the same configuration that I showed in my build (click on the link above to see the gallery), would still work. Depending on the orientation, it might be beneficial to flip the fan directions, but I don't think that matters too much.
