They have not mentioned that whether the gym is availble for girls or not so you can contact the college athority to check what all facilities they offer.

For reference, you can g through belowlink as well -

https://www.yenepoya.edu.in/facilities.html

Good Luck!!!!

Yenapoya University has several amenities for students.
However the facility of Gym is not mentioned on the website.
Kindly, contact the authorities who can guide you better or you request a query on the website of the college.