Gao Huaze joined Chinese Super League side Hangzhou Greentown's youth academy in 2008. He made a brief trial with Serie A side ChievoVerona in December 2015. Gao was promoted to Hangzhou Greentown's first team squad in 2016. He didn't play for the club in the 2016 season as Hangzhou Greentown struggled at the bottom of the league and relegated to the second tier. On 12 March 2017, he made his senior debut in a 3–2 home win over Nei Mongol Zhongyou. He scored his first senior goal on 6 May 2017 in a 3–2 away win against Beijing Enterprises. He scored the second goal of the season on 11 June 2017 in a 1–1 home draw against Shijiazhuang Ever Bright. Gao made 12 appearances and scored two goals in the first 18 matches of 2017 season. He absented the rest of the season for the 2017 National Games of China.