I found another website which includes some information about the Gulfstream and sister barges.
The Gulfstream is the second to last in the "Barges Built by Kelso Marine" category.

http://www.shipbuildinghistory.com/shipyards/small/westgulf.htm

Hi George, take a look at the link posted elsewhere in the comments by Yvon. A pretty clear case is made for this being the ex-US flag tank barge GULFSTREAM (ON 571009).
https://www.shipspotting.com/photos/1046314

Let's see, my friend, first read this:
https://ttweathercenter.com/2024/02/11/tobago-oil-spill-what-you-need-to-know/

Diver Alvin Douglas explained:
In their dive on Friday, the team made some new discoveries. Douglas said, “We also observe that there is a debris trail on the water that suggests that the vessel was turned over even before it made contact with the reef. The superstructure of the vessel was torn off. There were cranes, arms and railings all the way, and there’s a lot of destruction in that area.”

He also added, “We also found a cable that is connected to the bow of the vessel. That also suggests that the vessel may have been in tow because the anchor is secured where it’s at. But there is a huge tow line, approximately a third of the length of the vessel.”

My conclusion:

A ship is scrapped and the entire stern and superstructure is cut off and the bow and tanks are used to make a barge, which is done.

The bow and the tanks are converted into a tank barge.
And the Chinese use many of those here in South America.

They use them as fueling stations.

But they are always connected to a tugboat, which acts as a beacon ship.

Thank you, for your comment. A local media source last evening reported that specific Imo number for the vessel. However, government officials are saying roughly a day later that the vessel is still unidentified.
I have noticed those holes and wondered about them, so thank you for that information. Will continue to update as necessary.