| Prefix | Organization | Purpose | Web Site | Contact | Registered |
|---|---|---|---|---|---|
| g | Gianni Giorgetti Soft | TLog | www.dtcdip.it | Gianni Giorgetti | 30-Oct-1999 |
| GAS | George Alderman | Reserved; Reserved | George Alderman | 14-May-1998 | |
| GB | Graeme K Chandler | GrabBag; Toolkit | web.access.net.au | Graeme K Chandler | 30-May-1998 |
| GC | Grasso | reserved | Giuseppe | 10-Mar-2000 | |
| GCF | Gajits Cool Forms | www.gajits.com | Graeme Chandler | 24-Mar-2000 | |
| GD | Galactical Data | Miscellaneous | members.xoom.com/GData/ | Brandon Moro | 17-May-1999 |
| GFC | GForC | gfcVerboseCurrency | www.gforc.com | Anthony DiAngelus | 24-Sep-1999 |
| Gff | Opus Entertainment Uk | Giff File Reader | www.opusent.co.uk | Ian Murphy | 10-Sep-1999 |
| GFGL | Greg Lorriman | TGFGLWatchFilesForDelete; File Manage | www.lorriman.demon.co.uk | Greg Lorriman | 01-Feb-1999 |
| GG | AD Technologies | Guido Geurts | 06-Oct-1999 | ||
| GH | GH Freebrary (programming library for Delphi/Object Pascal) | rescatandoadelphi.blogspot.com/ | Al González | 17-Mar-2008 | |
| GJB | Geoden | various | George John Belland | 07-Apr-1999 | |
| GJL | Reserved | Geoff Lawrence | 16-Jun-1999 | ||
| GL | Object Lessons | GLAD; Toolkit | www.greglief.com/delphi.shtml | Greg Lief | 26-Apr-1998 |
| GL | Ground Zero Software | G.L.A.D. components for Delphi | www.greglief.com/glad | Greg Lief | 19-Oct-1999 |
| GLx | PC Solutions Software | Gustavo Lopez | 20-Jan-2000 | ||
| GMS | GM Software | various | www.gmsoftware.com | Gilles Muys | 11-Jan-2000 |
| GN | Globalnet | Reserved | www.globalnet.com.pl | Robert Bala | 10-Jul-2000 |
| GNORQ | Gnorq Technologies | reserved | www.xs4all.nl/~gnorq | Bart Pype | 05-May-1999 |
| GP | Design Insight Software Consulting Inc. | GlobalPlatform; Reserved | www.DesignInsight.ca | Robert Kozak | 19-Mar-1999 |
| GP | Primoz Gabrijelcic | Reserved; Reserved | www.eccentrica.org/gabr/ | Primoz Gabrijelcic | 01-Feb-1999 |
| GP | 2gP, Inc. | 2001 | Brian Nigl | 07-Jun-1999 | |
| GPC | Gefle Pedagogiska Centrum | Reserved | www.gdpc.se | Stefan Cedervall | 10-Oct-1999 |
| GPF | GPF | gpf.dataloss.net | Breyten J. Ernsting | 27-Jun-2000 | |
| Gr | Devgreen | GrFramework | devgreen.com.br | Gabriel Fonseca | 23-Dec-2012 |
| GRE | Glory Road Enterprises | In house components | Mark Greenhaw | 05-Nov-1999 | |
| GRK | Grok Developments Ltd | www.grok.co.uk/ | Chris Cowley | 14-Oct-1999 | |
| gr_ | 2 Bit Solutions | www.2bitsolutions.com | Gene Rhyne | 17-Jul-2000 | |
| GS | GeeSoft | VIMVCL; Toolkit | Mike Gee | 09-May-1998 | |
| gs | Glooscap Software | Bruce McGee | 16-Feb-2000 | ||
| GSD | Gryphon Software Developments | various | Niall Scott | 28-Jan-2000 | |
| GSW | GSWare | Garth Wilcox | 15-Feb-2000 | ||
| GS_ | Glider Software | Reserved | www.glidersoftware.com | Cary D. Beuershausen | 19-Jul-1999 |
| GT | Gerding Technologies | Reserved | Klaus Gerding | 02-Jul-1999 | |
| gt | Gilkey Technologies, Inc | Joe Gilkey | 28-Jul-2000 | ||
| gt | Gnostice Information Technologies | all components | www.gnostice.com | Girish Patil | 01-Jun-2006 |
| GTC | Gitek | Reserved | www.gitek.no/ | Tor Helland | 30-Jun-1999 |
| GTI | Gallant Technologies, Inc. | Reserved Namespace | www.gallanttech.com/ | Arthur Corliss | 12-Jul-2000 |
| GTS | TGTSOutlikeAddress | www.coderage.com | Glenn Thomas Stephens | 09-Aug-1999 | |
| GTT | GTT Net Corp, Inc. | Reserved; Reserved | Rodolfo A. Ridolfi | 22-May-1998 | |
| gtx | Gnostice Information Technologies | Components, class names, unit names | www.gnostice.com | Girish Patil | 23-Jan-2013 |
| GU | ICFM Software | Guiliani; SQL | dspace.dial.pipex.com/town/estate/ns21/icfmdc.htm | davout ?? | 19-Mar-1999 |
| GW | Greenworm Software | Greenworm Tools | Rijk van der Merwe | 01-Jun-1999 | |
| GW | Innova Software | Grid Works | www.innovasoftware.com | Matthew Styles | 06-Jun-1999 |
| GW | Geyer and Weinig GmbH | GWTel Components | www.gwtel.de | Axel von Dielingen | 07-Jul-2003 |
| GW_ | Reserved | www.xoom.com\Arvur | Arvur | 29-Aug-1999 | |
| GX_ | G Nunn | Gexperts; Toolkit | www.amano-blick.com/~gnunn/gexperts.htm | Gerald Nunn | 27-Apr-1998 |
| GX_ | GExperts Development Team | GExperts | www.gexperts.com/gexperts/ | Erik Berry | 24-Aug-1999 |
| Gzz | TGzzArb | Francis Smit | 22-Aug-2000 |