[1] Group-Coded Recording (Magnetband-Aufzeichnungsart, maximal 6250bpi)

[2] General Configuration Register

[3] Gas Cooled Reactor {Reaktortechnik}

[4] General Component Reference

[5] Group Coded Recording (->"IEEE Standard Dictionary")

[6] Ground Controlled Radar (->"NASA Acronym List")

[7] Galactic Cosmic Ray (->"NASA NGST Acronym List")