This is the 7494th most frequent Turkish word.
güner
"Güner" is a Turkish name and typically means "days" or "sunlights," derived from "gün" (day/sun).
In this sentence, 'Güner' is used as a proper noun referring to a person's name.
Güner yaz günlerini çok sever.
Güner loves the summer days very much.
Here, 'güner' is presumably used to mean 'days,' although it may not be a common usage.
Gece güner doğmadan önce çok sessizdir.
The night is very quiet before the days begin.
In this sentence, 'Güner' is again a proper noun used for addressing a person.