Gabapentin shouldn't have any interactions with testosterone. It's working on all sorts of different receptors in the brain and wouldn't even interact with hormones.
en.wikipedia.org
Gabapentin drug interactions:
Neurontin (gabapentin) is an anti-eleptic medication used to treat seizures that occur with epilepsy, as well as nerve pain associated with shingles. Learn side effects, dosage, drug interactions, warnings, patient labeling, reviews, and more.
www.rxlist.com
Gabapentin clinical pharmacology:
Neurontin (gabapentin) is an anti-eleptic medication used to treat seizures that occur with epilepsy, as well as nerve pain associated with shingles. Learn side effects, dosage, drug interactions, warnings, patient labeling, reviews, and more.
www.rxlist.com
Of course, if you're concerned, you should speak with the doctor who prescribed you with the Gabapentin and tell him your plans.