My research shows that the Tail number N987SA belongs to a GI, turboprop, not a GII. In the picture you can clearly see the tail section and spey engines and leaves no doubt this is a Gulfstream jet, so maybe a little tail number change for this special flight.
I stand corrected, it was a typo on the FAA page. It is a GII This is what is on the first page.
N987SA
DONNA BLUE AIRCRAFT INC (COCONUT CREEK FL)
Aircraft Grumman Academe (twin-turboprop) (G159/L)
Origin Fort Lauderdale Executive (KFXE)
Destination Cancun Int'l (MMUN)
This is what is on the 2nd page:
Aircraft Registration (N987SA)
Aircraft Summary
Summary Owner Airworthiness Serial Number
1975 GRUMMAN AMERICAN AVN. CORP. G-1159
Fixed wing multi engine
(22 seats / 2 engines) DONNA BLUE AIRCRAFT INC
COCONUT CREEK, FL
(Corporation) Standard/Transport 172
Aircraft Details
Engine Weight Speed Mode S Code
ROLLS-ROYC SPEY MK 511SR
Horsepower: 1140 (Turbo-jet) Over 20,000lbs 441mph 53343266
Registration Details
Status Certificate Issue Date Airworthiness Date Last Action Date
Assigned 2007-08-31 1975-11-11 2007-08-31