Does this show end or cliffhanger?

I would like to know too, because I'm very reluctant to watch shows even if they're awesome if they don't have an ending :( I imagine it was cancelled?

Yes it ends on a particularly suspenseful cliffhanger with most of the main characters in turmoil.

I hate that the network let it end like that, but I still think that it's worth watching. The last few episodes were very good.

I didn't catch The Gates when it first aired. I just watched the series thanks to a marathon on Chiller.