A Gold Wing carries substantial weight before the conversion begins, and many owners add a passenger and luggage. That makes rear structure, suspension, braking, reverse, service access and finished bodywork important parts of the same conversation.
Send the generation, year, current condition and photos of the bike. Tell us what luggage needs to stay, whether the trike will normally run two-up, where it will be used and whether reverse is essential.
From there we can assess feasibility and develop the build with you at the Hua Hin workshop rather than guessing from a generic kit specification.