KGPT Gulfport-Biloxi International — Instrument Checkride Guide

What kind of airport is KGPT and what is its IFR environment?

Gulfport-Biloxi International Airport (KGPT) is located at 28 ft MSL on the Mississippi Gulf Coast, approximately 5 nm northeast of the Gulf of Mexico shoreline. The airport operates with a control tower (123.7 MHz) and radar approach/departure service on 124.6 MHz and 127.5 MHz, with military-use frequencies 254.25 and 354.1 also assigned to the approach function. ATIS broadcasts on 119.45 MHz; ground control is on 120.4 MHz.

KGPT shares the terminal airspace with Keesler Air Force Base, a major Air Force technical training installation immediately adjacent. TACAN approaches and military-use frequencies appear in the published procedure inventory, and IFR pilots operating in the KGPT terminal area should expect potential coordination with military traffic. Commercial airline service to KGPT is limited but active, providing realistic sequencing without the sustained pace of a major hub.

What instrument approaches are published at KGPT?

KGPT has 13 published instrument approach procedures, sourced from AirNav and SkyVector. The approach inventory reflects the shared civil-military status of the facility.

Always verify current minima on official FAA charts. The Y and Z suffix designates separate procedures to the same runway — each has distinct routing, altitudes, and minima. Do not assume identical minimums between the Y and Z variants.

What is the runway configuration at KGPT?

KGPT operates 2 runways. Runway 14/32 is the primary instrument runway at 9,002 ft, long enough to accommodate commercial transports and the larger military aircraft that operate from the adjacent base. Runway 18/36 carries a Part 121 restriction that limits its use for scheduled air carrier operations.

Active runway configuration depends on wind and traffic flow. With southerly Gulf winds, Runway 36 arrivals are common for light aircraft, but ILS traffic typically favors Runway 14 or 32. Large aircraft face wingspan restrictions on certain taxiways — review NOTAMs for current restrictions before operating transport-category aircraft.

What weather should instrument pilots expect at KGPT?

The Gulf Coast location at KGPT produces persistent maritime moisture that drives sea fog and low ceilings, particularly from October through April. When Gulf surface water is warmer than the overlying air mass — common in fall — advection fog can develop rapidly and reduce visibility to 1/4 mile or less with ceilings below 200 ft. These events can arrive faster than forecast model guidance predicts.

Tropical weather from June through November presents the most significant weather hazard at KGPT. Tropical storms and hurricanes produce sustained IFR conditions with high winds, heavy rain, and low-level wind shear across the entire terminal area. KGPT has experienced direct landfalls and near-miss tropical systems; pilots operating in the Gulf Coast region must monitor National Hurricane Center guidance when tropical systems are active in the Gulf of Mexico.

Summer afternoon convection builds along the sea-breeze boundary 10-20 nm inland and moves back toward the coast by early evening. This produces a daily cycle of convective weather that requires continuous weather monitoring during afternoon and early evening operations.

What should you expect on an instrument checkride at KGPT?

A checkride at KGPT involves mixed civil-military airspace that tests situational awareness from the moment you copy your IFR clearance. Expect Approach to identify your aircraft type and separate you from military traffic operating on instrument approaches to Keesler. The DPE will be watching whether you maintain positional awareness of other traffic called by ATC and whether your readbacks are precise and timely.

The multiple Y and Z approach variants to Runway 14 and 32 provide a natural examiner tool. The DPE may assign the HI-ILS Y rather than the standard ILS Z — and the correct response is to pull the correct chart, not to assume the procedure is the same as a standard ILS. Briefing the correct initial approach fix altitude and transition routing for the assigned variant is an evaluable skill under ACS Area VI.

A common examiner discussion at coastal airports involves alternate airport requirements. Under 14 CFR 91.169, if the destination forecast is below 2,000 ft ceiling or 3 sm visibility at the ETA ±1 hour window, a filed alternate is required. Gulf Coast fog events frequently push KGPT below alternate minimums simultaneously with Mobile (KMOB) — the standard nearby alternate — requiring a more distant filing. Know your alternate selection rationale and be prepared to defend it.

Missed approach on the ILS Z RWY 14 requires immediate climb and navigation per the published missed approach procedure. Contact Approach on the assigned frequency without delay — Keesler departure traffic may be active on crossing courses. Under 14 CFR 91.175(e), once below DA, you must execute a missed approach if you lose the required visual references.

Practice Questions

1. KGPT Approach clears you for the ILS Z RWY 14. How does this procedure differ from the HI-ILS Y RWY 14, and what does the "Z" suffix tell you about the approach?

2. Your destination KGPT is forecast to be 800 overcast and 1.5 sm in fog at your estimated arrival time. Is a filed alternate required under 14 CFR 91.169? If so, what ceiling and visibility must the alternate forecast meet?

3. The ILS Z RWY 14 (SA CAT II) is published at KGPT. What additional certifications — for the aircraft, crew, and airport — are required to conduct a CAT II approach compared to a standard CAT I ILS?

4. You are on final for Runway 32 and Approach advises military traffic 3 nm in trail. What is your responsibility regarding traffic separation, and who bears the separation responsibility under IFR?

5. After landing at KGPT, the DPE asks why RNAV approaches are published for Runway 18 but no ILS is installed. What factors influence the FAA's decision to install an ILS versus publish only RNAV procedures at a runway end?

Frequently Asked Questions

Q: What instrument approaches are published at KGPT?

KGPT has ILS Y and Z approaches to Runways 14 and 32, including a Special Authorization CAT II procedure for Runway 14. RNAV (GPS) approaches are published for Runways 14, 18, 32, and 36. VOR and TACAN procedures are also listed. Always verify current minima on official FAA charts.

Q: What airspace does KGPT operate in?

Gulfport-Biloxi International operates with a control tower and Approach Control handling IFR arrivals. The airport shares airspace with Keesler Air Force Base, and military TACAN procedures are listed in the published approach inventory. Pilots should expect coordination with military traffic in the terminal area.

Q: What are the runways at KGPT?

KGPT has 2 runways. Runway 14/32 is the primary instrument runway at 9,002 × 150 feet with ILS on both ends. Runway 18/36 is 4,935 × 150 feet with RNAV approaches but no ILS, and carries a Part 121 restriction for scheduled operations with more than 9 passenger seats.

Q: What are the communications frequencies at KGPT?

Tower is on 123.7 MHz, ATIS on 119.45 MHz, and ground on 120.4 MHz. Approach/Departure uses 124.6 and 127.5 MHz depending on arrival direction. Military-use frequencies 254.25 and 354.1 are also assigned to approach.

Q: What weather hazards are common at KGPT?

The Gulf Coast location makes KGPT susceptible to sea fog and low ceilings from persistent marine moisture, particularly fall through spring. Tropical weather from June through November can produce rapidly deteriorating conditions. Summer afternoon convection is common along the coast and inland.

Q: Does KGPT have CAT II approaches?

Yes. The ILS Z RWY 14 (SA CAT II) procedure provides special authorization Category II capability. CAT II operations require specific aircraft, crew, and airport certifications beyond what is required for a standard instrument checkride. The standard ILS Z RWY 14 provides CAT I minima.

Sources

• AirNav — KGPT Airport Information
• SkyVector — KGPT Instrument Approach Procedures
• 14 CFR 91.129 — Operations in Class D Airspace (Cornell LII)
• 14 CFR 91.169 — IFR Flight Plan Requirements (Cornell LII)
• 14 CFR 91.175 — Takeoff and Landing Under IFR (Cornell LII)
• FAA Instrument Flying Handbook FAA-H-8083-15B
• National Hurricane Center

This article was researched from FAA primary sources (ACS, FAR/AIM, Advisory Circulars, Instrument Flying Handbook), approach procedure data from AirNav and SkyVector, and citing current 14 CFR Part 91 — drafted by MockDPE Editorial Team. Last updated: May 2026. If you spot an inaccuracy, email corrections@mockdpe.org.