Hello student yes IIM trichy accepts GMAT score and offer admission through GMAT.

ELIGIBILITY - Candidates must passed hold Bachelor degree in any discipline with minimum 50 percent marks aggregate from a recognized university.

For more details refer to the link mentioned below - https://www.google.com/amp/s/www.careers360.com/university/indian-institute-of-management-tiruchirappalli/amp

Feel free to comment if you've any doubt

Good luck