Don't deviate

There is an image link to the challenge:

I try inverse image search in google

I felt on this link https://www.bits-pilani.ac.in/pilani/management/PhotoGallery which seems to have a picture matching with the one in the challenge This place seems to be on pilani campus. On the website the picture as the description shiv ganga.

So i search "shiv ganga pilani campus coordonates" on internet, and i had been able to find this site : https://trek.zone/en/india/places/738025/shiv-ganga-pilani We can see thos coordonates : 28.3561 (latitude) and 75.5887 (longitude) So we submit GREPCTF{28.3561,75.5887} and it work