I just played a full round of Geoguessr world with Gemini 2.5 and got a score of 22k / 25k (so a silver medal). This puts in the realm of a "pretty good" player.

It was shockingly accurate with its guesses of Essen, Germany and Sheffield, UK, but faltered a bit in Italy (it thought Genoa was Siena) and Russia (it guessed Samara but it was actually a small town about 400 miles to the west). It also guessed Orlando when it was Tampa.

Still this was only giving it a single image to work off of, where any player would be able to move around for a few minutes.