Hii Kiran..You can get free made easy pdfs of all the topics in the given link below.

Check this link- https://www.erforum.net/2015/11/made-easy-hand-written-notes-for-civil-engineering.html?m=1

Even contact your seniors they may have that and you will get a good guidance from them.

Hope this helps you. All the best.

If you are looking the books for the preparation of GATE Civil engineering. You can prefer the books given below

Engineering Mathematics-  Discrete Mathematics and Its Applications by Kenneth Rosen

Structural Engineering - Theory of Structure by CK Wang, S. Rammamrutham, L.S. Negi

Geotechnical Engineering- Soil Mechanics by Gopal Ranjan

Water Resources Engineering- Water Resources by S K Garg

Transportation Engineering- Transportation by Justo Khanna

Environmental engineering- Environmental Engineering by S. K. Garg Part I & Part II

Geomatics Engineering- Surveying (vol. 1,2,3)  by Ashok Jain

For further information you can go through with given below link.

https://engineering.careers360.com/articles/how-to-prepare-for-gate-civil-engineering

If you are looking the coaching material then you can prefer Made Easy material for teh exam preparation.

Good Luck!