The date is 21st July
The object is 5 Metres tall
The Shadow at 9AM GMT is 31.75 metres long,
The Shadow at Noon GMT is 6.22 metres long,
The Shadow at 3PM GMT is 2.68 metres long.

(On 21 July, the sun is 20.4° north of the equator and crosses the meridian 6.3 minutes after local noon.)

I think: Yes, it is possible to determine the location of an object, if...

Just a guess wher it might be, without calculations/maps.
Havana? Sao Paulo?
Somewhere around there, maybe a little bit more to the west.