For your object to be in the GPU, it should be a tensor. If you have multiple objects you would like to pass to the GPU, you could stack them in a multi-dimensional tensor. A minimal example is below:
t1 = torch.tensor(1) # tensor(1)
t2 = torch.tensor(2) # tensor(2)
t3 = torch.tensor(3) # tensor(3)
t_list = torch.cat([t1.view(1), t2.view(1), t3.view(1)])
Out: tensor([1, 2, 3])

The .view serves for the unique case of 0-dimensional tensors to make them 1D. For higher dimensions it can be omitted.