gca gc • gcjp · · · Info · Definitions · Synonyms · Characters · · gca · · Text Latin · · Script 3 · · Length 1 · · Syllables Definitions · · · (noun) aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar. Synonyms: ground-controlled approach, GCA. · · Noun Definition 1 Synonyms · · · ground-controlled approach · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 g latin small letter g U+0067