That's great! Reading the documentation it seems there is no support for multiple clients and multiple GPUs (Many-To-Many), is there anything planned on that side?
Just go to the custom link at the bottom of the page, the link is: https://console.aws.amazon.com/cloudformation/home?region=us...
There you can select any number of clients and servers. For example: 5 clients and 1 server (many to one), or 5 clients to 5 servers (many to many).