I've never heard of Gigaflight but after looking at their website dollars to doughnuts their wire is more expensive than run of the mill mil-spec TEFZEL MIL-22759 (unshielded) or MIL-C-27500 (shielded) wire that you can get just about anywhere. Barring an issue you shouldn't ever have to rewire a plane in under 4 years, or even 40. AC 43.13-1B only states:
Wiring must be replaced with equivalent wire (see paragraph 11-78) when found to have any of the following defects:
a. Wiring that has been subjected to chafing or fraying, that has been severely damaged, or that primary insulation is suspected of being penetrated.
b. Wiring on which the outer insulation is brittle to the point that slight flexing causes it to crack.
c. Wiring having weather-cracked outer insulation.
d. Wiring that is known to have been exposed to electrolyte or on which the insulation appears to be, or is suspected of being, in an initial stage of deterioration due to the effects
of electrolyte.
e. Check wiring that shows evidence of overheating (even if only to a minor degree) for the cause of the overheating.
f. Wiring on which the insulation has become saturated with engine oil, hydraulic fluid,or another lubricant.
g. Wiring that bears evidence of having been crushed or severely kinked.
h. Shielded wiring on which the metallic shield is frayed and/or corroded. Cleaning agents or preservatives should not be used to minimize the effects of corrosion or deterioration of wire shields.
i. Wiring showing evidence of breaks, cracks, dirt, or moisture in the plastic sleeves placed over wire splices or terminal lugs.
j. Sections of wire in which splices occur at less than 10-foot intervals, unless specifically authorized, due to parallel connections, locations, or inaccessibility.
k. When replacing wiring or coaxial cables, identify them properly at both equipment and power source ends.
l. Wire substitution-In the repair and modification of existing aircraft, when a re placement wire is required, the maintenance manual for that aircraft should first be re viewed to determine if the original aircraft manufacturer (OAM) has approved any substitution. If not, then the OAM should be contacted for an acceptable replacement.