I'm likely mistaken. I haven't weighed the G1 rims myself, but in the spring I'll likely get some replacement RE92's and I'll weigh them then.
This source says 11lbs:
Wheel and Tire specs - Insight Central: Honda Insight Forum
This source says 11lbs, weighed on a scale:
Weight of OEM Wheel - Insight Central: Honda Insight Forum
I seem to remember reading another source that said he put his on a scale and read slightly over 10lbs, but 11 is probably correct. Officially, HX rims are 10.75lbs but mine weigh almost exactly 11lbs as per my calibrated digital scale, so I'll correct my earlier post.