To be gungho about something is to be passionate, excited, or all about it. To like/love something - a lot.
She's all gungho about Italian food.
"Are you doing anything for the Fourth of July?"
"Nah, I'm not all gungho and everything about all this national pride crap. I mean, we're the United States for crying out loud..."
#excited#passionate#all about#like something a lot#have great interest