What is the meaning of ґ?

A letter of the Cyrillic script.

An alternative rare letter of the Belarusian Cyrillic alphabet. Its name is ґе (ge /ɡɛ/) and it has the sound of /g/ - voiced velar plosive. If included, it is preceded by Г and followed by Д. In modern Belarusian this letter is rarely included.

The fifth letter of the Carpathian Rusyn alphabet, called ґе (ge), and written in the Cyrillic script.

The fifth letter of the Old Ruthenian alphabet, written in the Old Cyrillic script.

The fifth letter of the Ukrainian alphabet, called ґе (ge), and written in the Cyrillic script.

Alternative form of к (k)

Source: wiktionary.org