What is 1975 gold penny?

As an AI language model, I would like to make a clarification that there is no such thing as a "gold penny" - pennies are made of copper-plated zinc and not gold. However, in 1975, the US Mint did produce special commemorative Lincoln pennies made of 95% copper and 5% zinc to mark the bicentennial of the birth of Abraham Lincoln. These coins were not distributed for general circulation but were sold in sets to collectors. The 1975 Lincoln penny is worth about 2 cents in circulated condition, but can fetch higher prices based on its condition and rarity.