What if a guy asks you how are guys going after you ask him how are girls going with him and responds by saying gud is what does that mean does he want to see if your free or something else?

He might want to see you if you're free. Just talk to him. If you're interested in dating him, pay him some attention like casual chats or something. Just have fun. If he is interested, he will want to chat back and maybe go out with you. If all else fails, you can always ask him directly.