Denti:
As GA navigation relies usually solely on GPS for that kind of stuff RAIM is necessary, but that is not a general rule for all kinds of aviation.
Within the 48 continential states and parts of Mexico and Canada, As well as Alaska (I'm not certain how much of Alaska) the G-1000 is a WAAS navigator, thus does not require RAIM so long as WAAS is available.
When SBAS is operational in Europe, the G-1000 will then be a WAAS navigator there as well.