Hi, It seems that there is going to be a second season for the GATE light novels. though its shifting its focus away from the JSDF cast that we all know and love. as they are instead going to introduce a new cast and group of main characters.
I don't believe any of the original cast will be making an appearance in the new season, as the article seems to indicate this will take place in yet another new world.
Read about it here-
I wonder how this new story will develop.