Creating ligand topology which is contains Se atoms

GROMACS version:2020
GROMACS modification: Yes/No
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my complex is protein and ligand but my ligand has Se atom which is kind of transit metal.cgenff coudnt create ligand topology and charmmgui has failed ligand topology steps.so How to create ligand topology or which server should I use for my ligand inorder to create ligand topology,Could anybody give me any suggestions Please ?