G is for Gymnastic Giraffe

Gordon the goat grumbled grouchily. Grass gave him gout unless it grew newly green and gray skies made him gloomy. Gilbert the geko was much gayer, groovy and given to goofiness. Green and gray though he was, he golfed with a great gang of grasshoppers and gambled with gargantuan gorillas. And then Gia the giraffe arrived gyrating with geriatric gymnasts. Gordon gawked. Gilbert giggled. He gave guided tours of their grand garage. They grazed on green grapes and gulped grapefruit juice, though Gia suggested they add gin. Gaiety grew. Gordon finally guffawed, giving a go to the gasping good times.

[A drabble is a story in exactly 100 words]

[G adds an extra challenge. Not only are there fewer words than many letters, the letter has two (or more) sounds. I tried to keep them segregated to maximize the alliterative effect but it still loses something]