Another word starting with g is gloominess
global
grate, grill
ghoul
Grown up
gnashing
Maybe Gratis is a word that would work.
Glitterati
A beverage starting with the letter "g" can be Gatorade... or if you found another answer, then great.
Another word for accepted fact starting with "g" is "given." In the context of research or problem-solving, a given is a known or established fact that is accepted without needing further proof. This term is commonly used in mathematics, science, and other analytical fields to establish a starting point for analysis or discussion.
Another 'g' word for gadget is gizmo or gismo.
Gazelle
geyser