Answer:
Gleeful: There was a moment of silence, then a child's gleeful laugh
Gloating: They're gloating over their victory in the election.
Gluttony: His gluttony and drunkenness were notorious, and he was an athlete of great prowess.
Grabbed: She grabbed a handful of clothes from the drawer and threw them into the suitcase.
Grammatical: It is confirmed by grammatical considerations
Hope this helps :)