Setting game to Blueprint Generated gamemode using commandline

I have created a gamemode using blueprint and would like to be able to set the game to that mode using a .bat script.

Is there anyway to do that currently?

Current attempt:

“C:/Program Files/Unreal Engine/4.4/Engine/Binaries/Win64/UE4Editor.exe” “T:/proj/game/devProject/devProject.uproject” “T:/proj/game/devProject/Content/Maps/dev_v001.umap”?game=“BlueprintGeneratedClass’/Game/Blueprints/GameTest.GameTest_C’” -game


I have exactly the same problem, I don’t understand how to do that.
I’m using 4.10.3.

Any help would be appreciated.

My current attempt is with a FirstPerson blue print example.

UE4Editor.exe d:\MyProject\MyProject.uproject /Game/FirstPersonBP/Maps/FirstPersonExampleMap?game=/Game/FirstPersonBP/Blueprints/NewGameMode.NewGameMode -game

Thank you.