In 607, he offended Emperor Wen's son Emperor Yang of Sui (Yang Guang) by criticizing Emperor Yang's large rewards to Tujue's submissive Qimin Khan and was executed by Emperor Yang.
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In 598, angry that Ying Province (營州, roughly modern Zhaoyang, Liaoning) had been attacked by Goguryeo, Emperor Wen send his son Yang Liang and the general Wang Shiji (王世積) to attack Goguryeo—a campaign that Gao tried to dissuade Emperor Wen from but Emperor Wen launched anyway, and in fact forced Gao to serve as Yang Liang's deputy.
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He made Yang Su and his sons Yang Guang the Prince of Jin and Yang Jun the Prince of Qin the commanders of the three main prongs of the operation, with Yang Guang in overall command.
Gao | Gao Hucheng | Gao Xingjian | Gao Lin | Yuchi Jiong | Gao Yuanyuan | Gao Yan (politician) | Gao Wei | Gao Region | He Jiong | Gao Zhao | Gao Yang (artist) | Gao Yang | Gao Xiqing | Gao Xing | Gao Wenqian | Gao's oldest daughter | Gao Siren | Gao Pian | Gao Ming | Gao Jifu | Gao Hongbo | Gao Gang | Gao Feng (wrestler) | Gao Feng | Gao Cheng | Battle of Gao |