Sure, it does. If you're talking casually with friends, it's pretty common to drop the initial pronoun, especially when it's implied from context... which is ex

Sure, it does. If you're talking casually with friends, it's pretty common to drop the initial pronoun, especially when it's implied from context... which is exactly what happens in Japanese, except the context is larger. "[You] Gonna eat that pizza?" "[I'm] Gonna go to the store." "Where's John?" / "[He's] Eating."