If the main focus of your research is on the Hybrid Metaheuristics algorithm, then it is recommended to write the code yourself in order to gain a deeper understanding into the behaviors so that you can bring out the best of both algorithms.
If your main work is to optimize only a particular problem that you are studying, then there are many other algorithms that can prossibly arrive at the same results or solutions. Thus, GWO–PSO algorithm is not necessary for the work.
