The Gongche script is not yet in Unicode. The script has a tentative allocation at U+19BF0...U+19BFF in the  Roadmap to the SMP for the Unicode Standard.

One proposal for its inclusion has been submitted to the Unicode Technical Committee and WG2:

2017-04-03 Proposal to encode characters for Gongche Notation in SMP — Eiso Chan, Wáng Xiǎolěi, Hóu Lè, Jerry You ( L2/17-087)