If they're genuine U.S. quarters, then yes, they're legal tender at face value.
a legal medium of payment
The US has never minted gold quarters. A private company took genuine proof quarters and plated them with a thin layer of gold. Unfortunately that means they're altered coins and have lost any numismatic value they had as proofs.
No. British currency is only legal tender in the United Kingdom. British 2 Pence coins were made from bronze, they are now made from copper plated steel. They have never been made from gold.
It's gold-plated, not solid gold, as US quarters have never been made of gold. It might sell for a couple dollars.
A baby's skin is soft and tender. <><><> Tender can be a verb "I tender my resignation." It can be an adjective "This is a tender steak" It can be a noun "These gold coins are legal tender." or "he served on a ship in the Navy- a submarine tender."
The U.S. has never made gold quarters. It likely has been gold plated or just toned a gold color. Either way, it has no collectible value.
Gold-plated but not gold. It's an ordinary nickel that someone plated for use in jewelry or as a novelty piece. The US never minted nickels (or dimes or quarters for that matter) out of gold - it's worth far too much to use in small-denomination coins.
The US Mint has never made any gold quarters, it's a novelty coin that's been plated and has no collectible value.
$0.61 - good luck on those gold buffalo coins you bought being worth anything.... sincerely, your government -----[Clarification on this answer - Actual gold buffalo coins (also known as American buffalo) minted by the Federal Government are solid gold, and as legal tender worth $50.00 US but are far more valuable due to their gold content. The coins inferred above are made by private companies, are only gold clad/plated with 14mg of gold worth under $1.00 US, and are not legal tender. These coins should have the word COPY on them, and retail for under $20.00 US]
The Mint does not strike gold quarters it's likely been plated and is only worth more than face value to someone who wants it.
The Mint has never made gold quarters. If you have a gold quarter then it has been plated which destroys the numismatic value of the coin. Its value is 25 cents plus the value of the little bit of gold they used to plate it. Some chemicals can cause the quarter to turn different colors. This also does not enhance the value of the coin.
GE means Gold Electro-Plated or Gold Plated.