No, this is a long distance base wars CTF with vehicles. And CTF means capture the flag, not something else limited to your ideas.
I'm pretty sure, seeing as I've played many games, that it's fairly common not to have the bases super far apart. The only part of your server that seems to tie into what we normally see in a CTF map, is the fact that the bases are easy to get into, which is proper in a CTF map. My ideas are not limited. I was being pretty darn broad, and general about CTF as a whole. However, if you don't agree with me, that is your choice, and I DO respect that.
Also, base wars and CTF is a very broad game concept, you can't 'steal' it.
The game mode.. No. Of course you can't steal it.. However the fact that both things I've seen (yours and the old one I saw), have many things in common, both in how they look, and how they work out. Both have white slopes based maps. Both have bases really far apart, Both have many vehicles. Both have holes in the map filled with water. So many similarities, that I find it hard to believe that this is just a coincidence. I could be wrong, but usually when there are so many similarities, it means something was just re-used (in idea that is, not saying a direct copy, which of course is impossible). Pretty common in human nature, but most don't want to at least admit when they copied an idea. This is also why things become so stale.