This phrase seems to be a combination of 'Happy New Year' and 'gatehead,' which might refer to a traditional Chinese greeting placed at the entrance of a building or a celebration area. In Chinese culture, 'Happy New Year' is '新年快乐' (Xīnnián kuàilè). The term 'gatehead' is not commonly used in Chinese, but it might be a translation or a creative expression. No specific information is available about 'gatehead' in the context of Chinese New Year decorations or greetings.