For those interested in exploring the GXT file further, here are some additional resources:
In the directory of GTA San Andreas (typically C:\Program Files (x86)\Rockstar Games\GTA San Andreas\TEXT ), you will find several files with the .gxt extension. The most important is american.gxt . gta sa original american gxt file hit
Copy the original text folder into it before installing any mods. For those interested in exploring the GXT file