Final answer:
Jay Gatsby dons a white flannel suit, silver shirt, and gold-coloured tie to impress Daisy Buchanan in their first meeting. The attire symbolizes his wealth and grandeur, aiming to impress Daisy with his financial success.
Step-by-step explanation:
In F. Scott Fitzgerald's The Great Gatsby, the enigmatic character Jay Gatsby dresses with particular elegance for his first meeting with Daisy Buchanan. It's a momentous occasion for Gatsby, as he has been yearning for this reunion since they were separated five years prior. When Nick Carraway, who serves as the book's narrator and Gatsby's neighbour, arranges the meeting at his home, Gatsby sees it as an opportunity to impress and woo Daisy once again.
For this significant encounter, Gatsby chooses to wear a white flannel suit, silver shirt, and gold-coloured tie. This choice of attire reflects both his wealth and his desire to present an image of sophistication and grandeur to Daisy. The colours gold and silver, often associated with wealth and opulence, help underline Gatsby's financial success which he hopes will impress Daisy, who comes from old money.
The question's mention of Gatsby's employment and whether his suit is a requirement thereof is interesting but unrelated to the context of the meeting with Daisy. Gatsby's mysterious business affairs are hinted at throughout the novel, suggesting his wealth may not be solely from legitimate enterprises. However, for this important meeting, Gatsby's priority is to showcase his success rather than to adhere to any dress code mandated by his unknown business practices.