Bobby -- You have a very valuable coin. Don't advertise that you have it. I've known people who have had their houses burned down to get valuable objects.
DO NOT CLEAN YOUR COIN. CLEANING RUINS VALUE.
I can't tell from your picture if your coin is made of gold or silver. You say it is gold, and I believe you, but this coin was also produced in silver.
The gold coin in my picture sold for $89000 US dollars during a 2019 auction. Your coin is in worse condition, but the value should still be very high. Maybe $50000 to $75000.
The octagonal silver coin in my second picture sold for $396. The 'copy' coin in my third picture is gold-plated silver. It sold for $70.
Your coin looks genuine, but there are always fake coins out there. A genuine coin weighs 83.5 grams, plus or minus 0.3 grams. Get an accurate weight. If it isn't 83.5 grams, it may be a reproduction or a gold plated off-metal piece.
Handle your coin with white cotton gloves. Store it in inert material. It would be a good idea to get an in-person inspection by a reputable coin dealer. Find good dealers using this page:
If you are thinking of selling your coin, please understand that there are three ways to do this. For an overview, see this page:
Good luck with your coin. Let us know how it goes ...
Well, with only 36 grams, it's not an $89000 coin. Crum.
But, it is not time to give up. I've exhausted my reference material, but talking to a reputable coin dealer would still be worthwhile.
You might invest in a better camera. With a decent picture, I can photoshop a side-by-side comparison to a genuine coin. That would provide a little bit of info.
Taking it to a jeweler for a non-destructive XRF analysis would yield precise composition. Yours could easily be gold-plated silver, which would still carry some decent value.
I don't have them, but there are reference books which list all commemorative coins produced by the US government. If yours is a government issue, it will have value. If it is some type of fake produced by illegal operations, it will be less valuable. Trouble is, within the restrictions imposed by your camera, it looks genuine to me, not fake.