Not GP, but you are probably looking for the "Neural Architecture Search" series [1] [2] [3]. First one uses something like 1k GPUs for a month, next one is a bit more reasonable, and the last one actually has a reasonable training time, and has comparable performance to DARTS (see ENAS in comparison tables).

1: https://arxiv.org/abs/1611.01578 2: https://arxiv.org/abs/1707.07012 3: https://arxiv.org/abs/1802.03268