Do Apple support CoreML inference with GPU(MPS) on macOS10.13+ ?

HI,@apple dev, can you apple make sure of macos10.13 support coreml using gpu infering?
I used macos10.13.6 do a test ,I found my coreml model inferring only using CPU(BNNS), no gpu using .... So can anyone could make sure of that? give me an answer... Thanks