Acronym for "Ĥan-Gulim-Munĵa Kodo" (Code of Chinese characters), a new code created by a French student, Sébastien Gantois¹ , for encoding every Chinese character, even Việt-Namese Chữ nôm or Korean Gugyeol, using radicals numbers for description. It mean that the code has to be as shorter as possible.
The HGMK looks like this:
radical number-strokes left-(other radicals apearing) in Minlingo (latin script): eltermunĵa zenbakkodo-cuzeca jazmakidzenbako-(cuzeca eltermunĵa zenbakkodo)
(this last part will not be present on radicals codes)
For example, the character 一 is a radical itself, the radical #1, so its code is: 001-00
The code for 猫 is 094-08-(140-102) ➔ 094=犬(犭) +8 strokes (苗) consisting of 140=艸(艹) and 102=田
It can also be used for Nôm: the character 𠊛 has for code: 009-10-(072-001-041)