Is it G as in Guy or G like Giovanni or Giselle (similar to a J sound)?
Gizable as in:
Gizz Guys Geez Jizz Jyes Jeez
EDIT: coincidentally, not 5 minutes later I came across this: http://gizmodo.com/5749451/how-the-hell-do-you-pronounce-gif...
The name Gizmodo is pretty clear to me as the hybrid of gizmo and modo, planting it firmly in the "guh" G sound.
But Gizable.... not so clear!
Is it G as in Guy or G like Giovanni or Giselle (similar to a J sound)?