I need help determining when to take my Nexium!?

Remember the most important point is to "take your medicine"! The food and timing recommendations help you to get the most benefit from it and also help to reduce the side effects.
This is what I would recommend:
Take your Levothyroxine, Nexium, Lisinopril and Gabapentin together as soon as you wake up (all these medicines would then be taken on an empty stomach).
Take your Nexium, Norvasc and Gabapentin together around an hour before dinner.

See how you go with this. Ideally gabapentin should be taken with food. If you start to notice any nausea or stomach upset then take your gabapentin separately with breakfast and dinner.

The levothyroxine has to be the first thing you take every day. It must be given on an empty stomach. I see what your confusion is. I would ask the pharmacist, but I think an hr after breakfast might be a good idea for you, then the other at bedtime.

Just as your levothyroxin should be taken at least a half an hour before your morning meal, the Nexium should be taken at the same time every morning and evening and at least one hour before consuming any food or beverage. Your other medications can be taken as prescribed. So I would take the Nexium one hour before the morning meal, the levothyroxin half an hour before the morning meal, the other meds with the morning meal and then the nexium again one hour before the evening meal followed by the Norvasc and gabapentin as prescribed.

I was instructed to take my Nexium with my AM medications. And the second dose with my nighttime meds by doing this you have a 12 span between doses.
Kathy