Not yet, it is not supported as of Oracle GoldenGate 12.3.0.1. Please refer to Does GoldenGate support capture from Identity columns (Doc ID 2090832.1) for the details. The plan support is in Oracle GoldenGate 12.3.0.2 with the defect is tracked by 25477801. Before the support, you can use sequence instead.
Created 10/17/2017, Last Updated: 1/19/2018