GTM is a file format used by GreekToMe, a free software created by Chuck and Andrea King. GTM files store data in encrypted binary format; GTM filenames should not be manually modified by user.

GreekToMe is a New Testament Bible translation application. GTM files hold database of Greek words and their translations. GreekToMe is available for most popular system platforms, including Android (mobile version is a simplified version of the software limited to only basic features).