| gxa | General CADD Attribute Data |
| gxb | GP32 ROM Image |
| gxc | General CADD Pro Component |
| gxh | General CADD Pro Hatch |
| gxkey | GameEx Registy Data |
| gxl | Graph Exchange Language |
| gxm | General CADD Pro Macro |
| gxml | Guideline XML Data |
| gxs | GrafiXML Graph |
| gxv | General CADD Pro Menu |
| gxy | ISIS GIS Visualiser Schematic Data |
| gyg | Gygan Data |
| gym_zip | eXtendable Wad Editor GYM_ZIP Data |
| gz1 | Orgadata LogiKal Data |
| gzf | WebCopier Data |
| gzl | Go!Zilla File List |
| gzmat | Gaussian Z-Matrix Chemical Modeller Input Data |
| h00 | Flash ROM HEX File |
| h01 | Flash ROM HEX File |
| h02 | Flash ROM HEX File |
| h03 | Flash ROM HEX File |
| h04 | Intellution FIX32 Historical Data |
| h08 | Intellution FIX32 Historical Data |
| h10 | At Home Canada 2010 Tax Return Data |
| h11 | At Home Canada 2011 Tax Return Data |
| h12 | At Home Canada 2012 Tax Return Data |
| h13 | At Home Canada 2013 Tax Return Data |
| h14 | At Home Canada 2014 Tax Return Data |
| h15 | At Home Canada 2015 Tax Return Data |
| h16 | At Home Canada 2016 Tax Return Data |
| h17 | At Home Canada 2017 Tax Return Data |
| h1c | Microsoft Help Collection Definition |
| h1d | Microsoft Help Validator File |
| h1h | Microsoft Help Merged Hierarchy File |
| h1k | Microsoft Help Keywords Index |
