I have a map/scoreboard spammer set up with mine. G1 = map spam at the same rate recon motion mines tick, gives me a pretty clear picture of what's going on.
It's setup to something like:
press once for map spam
press again to perform slower map spam
press again for cancel
G2 is scoreboard, mostly used to find people's names for admin commands while maintaining at least some visual of where i'm at and if there's an enemy point a gun at my face. It's got the same setup mentioned above.
G3/G4 are a combined macro i use for auto-killing games that crash faster than a normal CTD does. it also re-runs the .exe or steam shortcut afterwards. G3 is the kill, G4 is the re-run that picks up the last ran .exe.
G5/6 are stuff I have reserved for work related stuff. Particulary rendering shortcuts in CAD and Solidworks as well as a few other things that are special.