Black pipe as electrical conductor for stainless steel gas pipe

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I am a Builder and have read some articles about stainless steel flexible low pressure gas lines, i.e., such as what supplies a cooking range, laundry dryer and hpot water heater potentially developing small holes if a home were to be struck by lightning and the stainless pipe wasn't grounded.

My flexible gas pipes are attached to black pipe, both ferrous metals, but are connected with a brass fitting, a non-ferrous metal.

Any thoughts on this? Greatly appreciated in advance.

Stephen Strelecki
A home builder - Bethlehem, PA, USA