How do use gilded in a sentence?
The businessman wore an expensive gilded blazer to the office party, bad idea, red wine stains.
If by "gilded" you mean to coat something in a very fine coat of gold leaf or paint then here you go: "The artist gilded the vase." However, if you meant "gilded" as something that is rich looking on the inside, but cheap on the inside then this would be an appropriate sentence: "The statue appeared to be worth a lot of money, but in fact it was just gilded.".
The Gilded Age (so named by Mark Twain and Charles Dudley Warner referring to the ostentatious and excesses of the rich robber barons of the time) was an era of rapid economic and population growth in the United States during the post-Civil War and post-Reconstruction eras of the late 19th century (1865-1901) and is probably most famous for the creation of a modern industrial economy.