This is the 5019th most frequent Turkish word.
gördüğüm
"That I saw" or "what I saw."
The word 'gördüğüm' here is used as a past participle adjective, meaning 'I have seen', describing the most beautiful view the speaker has encountered before.
Bu, gördüğüm en güzel manzaraydı.
This was the most beautiful view I've ever seen.
The word 'gördüğüm' in this sentence is used to convey 'as far as I can see,' indicating the speaker's observation or perception.
Gördüğüm kadarıyla bu durum çözülmez bir hal almış.
As far as I can see, this situation has become insoluble.
Here, 'gördüğüm' functions as a modifier that refers to a city described as the one the speaker saw, acting as a relative clause in Turkish.