My guess is that the non-linearity of the problem might make it harder for something like Gurobi to solve. GAMS is essentially a frontend for solvers, so you ar

My guess is that the non-linearity of the problem might make it harder for something like Gurobi to solve. GAMS is essentially a frontend for solvers, so you are compiling your input source into a format suitable for an underlying solver or a set thereof.