Gondi was developed by a gentleman named Munshi Mangal Singh Masaram, to be used in central India to write the Gondi language. (In India, it almost appears that people don’t take a spoken language (and hence ethnicity) seriously unless it has its own writing system.)
Gondi is an abuguida, and all the consonant glyphs have a short horizontal line on the right-hand side, looking sort of like a hyphen. The vowel diacritics all sit sort of “on top of” this hyphen. When the consonant participates in a consonant cluster, the hyphen is omitted.