This is the 11791st most frequent Turkish word.
gelmenin
"Gelmenin" means "of coming" or "the act of coming" in English.
In this sentence, 'gelmenin' is used as a nominalization of the verb 'gelmek' (to come or arrive), turning it into a noun phrase meaning 'the act of arriving'.
Eve geç gelmenin olumsuz sonuçları olabilir.
Arriving home late can have negative consequences.
Here, 'gelmenin' designates 'the act of coming' as a subject in the assertion about correctness.
Arkadaşlarının yanına gitmek için gelmenin doğru bir davranış olduğunu düşünüyorum.
I think coming to join your friends is the right behavior.
In this example, 'gelmenin' is used with 'olacağını' ('would be'), showing its role as the subject of future expectation or occurrence.