Gesture means a movement or position of the hand, arm, body, head, or face that is expressive of an idea, opinion, emotion, etc.
Usage Example: She raised her head high in a gesture of disdain.

Jester means a person who is given to witticisms, jokes, and pranks.
Usage Example: The life of a jester is very lonely and solitary.

Ghastly means shockingly frightful or dreadful; horrible.
Usage Example: It was a ghastly sight to see the drought hit people crying out for water.

Ghostly means characteristic of, or resembling a ghost; phantasmal; spectral.
Usage Example: At night the dark room in the hills looked ghostly and full of shadows.

Gibe means to utter mocking or scoffing words; jeer.
Usage Example: He wanted to gibe at the, but not finding the appropriate words made him keep quirt.

Jibe means to be in harmony or accord; agree.
Usage Example: The report did not jibe with the observations of the managing director.

Jive is a style of lively and jerky dance performed to jazz and, later, to rock and roll.
Usage Example: She prefers jive over salsa.

Gild means
1. to coat with gold, gold leaf, or a gold-colored substance.
Usage Example: The domes of the temple were gilded with a thin plate of gold.
2. Wealthy and privileged
Usage Example: The gilded fools who surrounded the Prince.

Guild is an organization of persons with related interests, goals, etc., especially one formed for mutual aid or protection.
Usage Example: Protection was given only after ten years of joining the gild to its members.

Gilt means to coat with gold, gold leaf, or a gold-colored substance.
Usage Example: There was a huge gilt framed oil painting above the mantelpiece.

Guilt means the fact or state of having done wrong or committed an offence.
Usage Example: He remembered with sudden guilt that he had not called his mother

Gist means the main or essential part of a matter.
Usage Example: The personal assistant gave the gist of the topics discussed at the meeting.

Grist means grain intended to be or that has been ground.
Usage Example: They had a grist mill which was run by the electricity produced with water.

Jest means a joke or witty remark; witticism.
Usage Example: It was difficult to judge whether her remarks were made in jest or in earnest.

Glance means:
1. To look quickly or briefly.
Usage Example: She quickly glanced through the company reports.
2. To allude briefly to a topic or subject in passing.
Usage Example: At a glance he could make out that the atmosphere was not congenial.

Glimpse is a very brief, passing look, sight, or view.
Usage Example: The glimpse of the ocean from the window was breathtaking.

Glut means to flood (the market) with a particular item or service so that the supply greatly exceeds the demand.
Usage Example: During the rainy season there was a glut of fish in the market but no demand.

Gluten is a protein consisting of a mixture of glutelin and gliadin, present in cereal grains, especially wheat. 
Usage Example: Doctors these days are advising a lot of patients to have a gluten free diet.

Glutton means a person who eats and drinks excessively or voraciously.
Usage Example: He gorges on food like a glutton.

Gored means to pierce with or as if with a horn or tusk.
Usage Example: The bull gored the horse and it died immediately.

Gourds are the fruit of any of various cucurbitaceous or similar plants, especially the bottle gourd and some squashes.
Usage Example: Wild gourds can at times be poisonous.

Gorilla is the largest anthropoid ape, Gorilla gorilla, inhabiting the forests of central W Africa.
Usage Example: The forest was infested with gorillas.

Guerrilla or Guerilla means a member of an irregular usually politically motivated armed force that combats stronger regular forces, such as the army or police.
Usage Example: Guerilla war though successful is based on unorthodox methods.