Need Custom Mutation, Crossover and Creation function.

Thanks for reading this. I am going to optimize a mixed integer multiobjectibe optimization problem consisting of three objectives and 80 variables. I am using gamultiobj solver in optimization toolbox. 55 among 80 variables are binary (0 or 1). My problem is the solver can not provide me the integer value for 55 bunary variables. It has given the values between 0 and 1. But, I need either 0 or 1. I have come to know that for solving mixed -integer problem with gmultiobj solver it requires special mutation, crossover and creation function. So, I am badly in the need of these special functions for my problem. Can anyone please provide me the three custom m files for binary variable type. it will be great help indeed. Thanks in advance.