Does Guild war 2 consume more GPU than World of war craft?
It depends on your setup and your scene.
well i have a gtx 1080 and i7 8th gen CPU, what setting can i play with a high fps?
Most likely, yes. Guild Wars 2 is notorious for having bad engine optimization, and also it is built on DirectX 9.0c, a graphics API designed for 15 year old graphics cards and that is not optimized at all for modern hardware.