This is the 3230th most frequent Turkish word.
gerekirse
"If necessary" or "if needed."
In this sentence, 'gerekirse' is used to imply doing something (working at night) if deemed necessary for achieving the goal (completing the project).
Bu projeyi tamamlamak için gerekirse geceleri bile çalışırım.
If necessary, I will even work at night to complete this project.
Here, 'gerekirse' indicates a planned action (informing the authorities) in case necessity arises.
Gerekirse yardıma ihtiyacımız olduğunu yetkililere bildiririz.
If needed, we will inform the authorities that we require assistance.
In this example, 'gerekirse' is employed to highlight a conditional scenario (arriving earlier) to prepare adequately for the match.