Gromacs tutorial for covalently bound protein-ligand complex?

Hi gromacs community,

Does anyone know of any tutorials for covalently bound protein-ligand simulations? I feel setting up such simulations in gromacs is quite non-intuitive and I am surprised to see that there isn’t enough clear, step-by-step literature on this, similar to tutorials by Justin Lemkul.
Any pointing towards relevant links would be helpful.

Kind regards,
Ganesh