How do you dose gabapentin in patients with renal failure?  

There are many algorithms available online about the renal dosing of gabapentin. However, it should be emphasized that the recommendations are not based on large patient studies; therefore, the efficacy of the reduced doses for neuropathic pain is not certain (Raouf et al., PMID 28184168).

Max of 200 to 300 mg per 24 hours. I consider avoiding it altogether.

Start low. Dose to effect/side effects (not a specific number).