Ok, I can't figure out how to make it so my maps can support multiple gametypes. It seems to be game labels, but it won't let me change it from no label.
In the forge lobby you have to select the gametype you want to select, then go into forge and set labels.
Thread should be in forge discussion. Post above answers the question. On another note, instead of making a new thread.. I think it would be worthwhile someone making a list of all the labels for each gametype with a description of what they do. That would help SO BADLY!