87 GN-What option packages were available with the GN(WE2) package?

Just bought an 87 GN. It appears loaded-ps, pw, a/c etc. Looked on a couple of sites to see what factory option packages were available and it is not clear what packages were for the GN or which packages created a delete on other packages or created a must have package x. Could anyone please clarify this for me? thanks

Just bought an 87 GN. It appears loaded-ps, pw, a/c etc. Looked on a couple of sites to see what factory option packages were available and it is not clear what packages were for the GN or which packages created a delete on other packages or created a must have package x. Could anyone please clarify this for me? thanks
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GN Registry

The GN package was an option in itself. All turbo cars had a/c. That's about it. You could get a GN with a single track rear, radio delete, crank windows, no tilt, no cruise, etc. The GN package came with buckets and console, all black exterior, rear spoiler and chrome wheels.

FWIW & IMHO:
www.gnttype.org
lists virtually all of the options for the turbo Buicks