| Tail Number / N-Number | N921MG |
| Manufacturer | GULFSTREAM AMERICAN CORP. |
| Model | G-1159A |
| Year Built | 1981 |
| Manufacturer's Serial Number | 308 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 21 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | ROLLS-ROYC |
| Engine Model | SPEY MK 511SR |
| Engine Type | Turbo-jet |
| Number of Engines | 2 engines |
| Horsepower per Engine | 1,140 hp (850 kW) |
| Total Horsepower | 2,280 hp (1,701 kW) |
| Type of Registrant | LLC |
| Owner Name | EMSI AVIATION LLC |
| Street | 3504 CRAGMONT DR STE 100 |
| City | TAMPA |
| State | FL |
| Zip Code | 33619-8300 |
| Region | Southern |
| County | Hillsborough County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1993-02-23 |
| Certificate Issue Date | 2020-03-04 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-03-31 |
| Status | Valid Registration |
| Mode S Code | 53141373 |
| Mode S Code Hex | ACC2FB |