There are multiple definitions:

1. gradient-recalled echo(English)

   • aka GRECO
   • FGRE, MRI, SE, GRECO
   • Medical imaging
   • https://doi.org…GING.112.973560

2. glucocorticoid responsive element(English)

   • a DNA sequence that binds the glucocorticoid receptor to regulate gene transcription, either activating or repressing it
   • ERE, TRE, GC
   • Transcription, Regulation / control, Genetics
   • https://doi.org…immu.2019.01545