I am using gridseed with rasberry pi preloaded with some miner which I don't even know what it is. And yes, I only can use stratum protocol on it.
Then the stratum mining proxy is what you need. You'll want to set up the linux wallet on your pi, set it up as a server in your configuration file, set up the mining proxy, then configure your miner with your mining proxy. If you don't know how to do this, join here and I can help you better:
https://kiwiirc.com/client/irc.freenode.net/#cganomaly