[gmx-users] ligand problem

[kiana moghaddam]

Hi gmx-users
I prepared the DNA topology by using the parmbsc0 force field. I want to apply the GAFF force field for the ligand by using the antechamber module of ambertools13.
I optimized my ligand by Gaussian program at B3lyp/6-31G* in solvent (water) phase, but I don't know how to calculate RESP for the ligand by antechamber.
can someone help me to address this problem?
Best Regards 
kiana