fgoalattain for multiobjective quadratic optimization

I have multiple quadratic functions that I need to maximize subject to linear constraints. How can I do that in matlab with fgoalattain. The problem is like this: Maximize:

x1^2 + x2^2+...+xn^2

y1^2+y2^2+...+yn^2

z1^2+z2^2+...+zn^2

...............

subject to:

F(x1,x2,...,y1,y2,..., z1,z2,...)<=1

G(x1,x2,...,y1,y2,...,z1,z2,....)=0

Where F and G are linear functions. I need each of the quadratic functions to be maximized to be as close as to 2 and all functions have the same importance. Many thanks!