The syntax for gamultiobj includes linear inequality constraints: X = gamultiobj(FITNESSFCN,NVARS,A,b) If v is your vector of n decision variables, and you want v(1) > v(2), v(2) > v(3),...,v(n-1) > v(n), set your A matrix as
v = zeros(1,n);
v(1) = -1;v(2) = 1;
A = gallery('circul',v);
A(n,:) = [];
b = zeros(n-1,1);
