10 Apr 2010 at 04:04 - 4
October Jade is right about the armor. However, you asked about "gear." While a Ranger primary can not wear armor designed for a different primary class, a Ranger primary can wield weapons and offhands/shields with non-Ranger requirements. Depending on your build, this may not be particularly effective, but the game does not prevent you from, say, running around with your Ranger wielding a staff with a Fire Magic (Elementalist) requirement.
Cheers,
Luny