What does Grt stand for?

Grant's Pennsylvania Cases - A publication (DLA)

Graphic Technician - MARC relator code - Library of Congress (LCCP)

Gabon-Air-Transport - ICAO designator (FAAC)

Gamma Ray Telescope

Gamma Ray Tube

Garo - Language code (ETLW)

Gas Recombinant Technology - Battery engineering

General Reactor Technology (NRCH)

General Recomplement Trigger (SAUS)

General Recorded Tape (SAUS)

General Recorded Tape Corp. (SAUO)

General Relation Treaty (SAUO)

General Relativity Theory (SAUS)

Geodesy Research Group (SAUO)

Geriatric Rehabilitation Team - Australia

Germanium Resistance Thermometer (ACAE)

Glimcher Realty Trust - NYSE symbol (SPSG)

Government Rate Tender

Graduate Respiratory Therapist

Granite Boatworks Inc., Mount Vernon, WA - Manufacturer code for watercraft hull identification number (USCG)

Graphic Technology, Inc. (SAUS)

Gratio - Tennessee - Seismograph station code, US Geological Survey (SEIS)

Great (ROG)

Grist Mill Manufacturer - NCIC firearms make code (NCIC)

Gross Registered Tons - Navigation

Gross Requirements Tapes (ACAE)

Ground Radio Telescope (SAUS)

Ground-Readiness Test (SAUS)

Ground-Received Times - Solar wind measurements

Ground Resistance Tester

Group Rapid Transit - TRB (TAG)

GTC Transcontinental Group Ltd. - Toronto Stock Exchange symbol

Gujrat - Pakistan - Airport symbol (AD)

Gun Reference Time (SAUS)

Tri-County Regional Library, Rome, GA - Library symbol - Library of Congress (LCLS)