The initial idioms of the letter G

gemstone	gen
gen X	gendarme
gendarmerie	gendarmery
gender	gender agreement
gender identity	gender role
gene	gene chip
gene delivery vector	gene expression
Gene Kelly	gene linkage
gene mutation	Gene Sarazen
Gene Tunney	genealogic
genealogical	genealogist
genealogy	general
general agent	General Agreement on Tariffs and Trade
general anaesthesia	general anaesthetic
general anatomy	general anesthesia