Question regarding port installed option codes

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In a status report from my dealer regarding the truck I am waiting for, my dealer said this:
"4Runner is a 8676 in Shadow Mica with port installed options S6 I1 L1 DD G1 M5" (this is in Gulf States region)

Through my research, I know the following:

8676 - Sport, V8, 2WD
S6 - Security System
L1 - Leather Seats
DD - Rear Spoiler
M5 - Carpet Mats
I1 - ??
G1 - ??


Anyone know what the "I1" and "G1" stand for?

They're not listed here

 

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Got a response from dealer:

Those code are internal codes, vehicle fuel, and pre delivery service, it's on every vehicle that comes through. It doesn't cost anything extra.