Just a little curious.
Is the LN that this manga based on completed?

From what I see at baka-tsuki, there's only 4 volume so far and the last volume was released in 2011.
Does that mean the LN end at volume 4? 😕

Initially it was a Webnovel (like MKnR) Fan blog:

Webnovel had total 5 volumes and it was more politically heavy from what i heard

then it got Serialized, and currently has re-published 4 volumes (less politically heavy version)

So still 1 more volume to go

wew... only 1 more vol to go. why is it so short?!?
Hope it'll get new arch or the manga create it's own storyline to continue after the Novel. Coz, IMO 5 vol is just too short man.

Thanks for your info BN1M.

Gate is actually a novel. The light novel is the remade version. Gate has three serializations. A online version and a published version which is both complete. The current one is a new version with the more traditional light novel format. This one will be on-going and won't be ending, the author changed some parts so the story can continue. Best of all... More artwork!