C64 Intros
Galaxy Galaxy Enterprises [GLX] Galaxy Force Game Brothers, The [TGB] Game Killers, The [TGK] Game Masters Gamebusters 1541, The Gamebusters 1992, The Gamehall Gamma Cracking Force [GCF] Gandalf Sound Crackings [GSC] Gang 1933, The Gang Against Protection [GAP] Gang, The Gangsters Garbage [GRB] Garbage+Troep Gash Gate, The Gax777 Gazunda Gedeon GeePee Geiersoft [GST] Gemini Crew, The Genesis Project [G*P] Genesis Project+Exodus Genesis Project+Transcom Genetix [GTX] Genlog Gente Incorporated Gentlemen Geordie Krackin Group German Cracking Company 1911 [GCC] German Cracking Crew [GCC] German Cracking Service [GCS] German Dynamite German Software Pirates [GSP] German Spreading Service [GSS] German Team, The [TGT] German Web, The [WEB] Ghost Giants (DE) Giants (FI) Gigaline Globetrotters [Globz] Glory God Gods Goonies, The [TG] Gotcha [GO] Gothic Design [GTC] Graf Binaer Gravity Greasers Great Breakers, The [TGB] Great Krefeld Connection, The [GKC] Great Robert, The [TGR] Great Spynetwork, The [TGS] Greatest Crackers, The [TGC] Green Light Griffith Grossmogul Cracking Service [GCS] Group A GSG 9 Guardian Angels [GA] Guardian Angels+Bass, The Guardian, The Guardians Incorporated, The [TGI] Guards Of Doom [GOD] Guards, The [TGS] Guess Who Limited Gulas
Some info comes here.