I'm afraid due to costs I use the 100mg capsules of gabapentin so the dose in ml would be quite different, I give 0.4ml of the suspension I make up, or did when I used it.
But that was a 40mg dose, if you know the mg/ml dose from the bottle we might be able to see how much difference there is but I cant say I'm good at maths unfortunately. The exotics vet did say much more than 30mg, she would expect some sedative effect, mine never showed any even at the higher than normally used dose of 40mg but that could have been due to the fact it was a powder and I mixed the solution up myself vs one made in a pharmacy.
Sorry that's not a huge amount of help!