The pyCUDA gpuArray class supports slicing of 1D arrays, but not higher dimensions that require a stride (although it is coming). You can, however, get access to the underlying pointer in a multidimensional gpuArray from the gpuarray member, which is a pycuda.driver. DeviceAllocation type, and the size information from the gpuArray.dtype.
Itemsize member. You can then do the same sort of pointer arithmetic you had in mind to get something that the driver memcpy functions will accept.
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