Hello Thejas A Nair,
I am a master's student doing a project on gravitational wave, is there work done in gravitational wave using this toolkit. I would like to work on some codes for my project.
Depends on what you mean by "work on gravitational waves", which is a large area of research.
The toolkit is used for numerical astrophysics and gravitational waves produced by colliding compact objects have been a long standing target for these types of simulations.
Eg the GW150914 gallery example:
http://einsteintoolkit.org/gallery/bbh/index.html
contains an extensive set of Mathematica notebooks that show how one can process the gravitational waves produced.
If you are thinking of eg post-Newtonian work, then no the ET is the wrong toolkit for this.
If you are thinking of extreme mass ratio inspirals then the black hole perturbation toolkit
may be useful for you.
To get an idea what the ET is currently being used for you can query eg the arXiv for it:
https://search.arxiv.org/?in=&query=%22Einstein%20Toolkit%22
which gives some idea of what it can be and is used for.
Yours, Roland