The only gloves I’ve found which are consistently waterproof are the Mountain Hardwear ones which use a technology called OutDry, which bonds a PU liner to the inside of the outer of the glove – no floppy inserts or water pooling between the outer shell and a waterproof, floating liner.
Use a pair all winter as shell gloves with various liners and they were great. Never leaked, never got moist and sweaty – MHW Epic Glove, they do have a fine tricot lining, but in cold conditions, added thin liner gloves or thicker ones, PowerStretch for example, work well.
These: http://www.mountainhardwear.com/Men%27s-Epic™-Glove/OM3298,default,pd.html
Not cheap and not bike specific – I don’t think anyone makes bike gloves using OutDry – but impressively good.