Run go32 with no arguments, it will tell you its version, like this:

  C:\DJGPP> go32
  go32 version 1.12.maint2 Copyright (C) 1994 DJ Delorie
  Lowest version I can run is 1.08
  go32.exe usage: go32 [-d {debugger}] [{program} [{options} . . . ]]
  go32.exe build time was Sun Sep 11 21:30:28 1994
  VCPI (Expanded) memory available: 9092 Kb
  Swap space available: 104360 Kb
  C:\DJGPP>