What Is A GAMP?

What Is A GAMP?

GAMP is the shorthand used across the trade for the Georgia Master Plumber License Exam (Class II Unrestricted). It is the state-administered credentialing exam that a plumber must pass to hold an unrestricted master plumber license in Georgia - the license level that allows a plumber to design, install, and supervise plumbing systems without the scope restrictions attached to Class I or specialty licenses. Because the acronym gets reused loosely in casual conversation, it's worth being precise: on this site, GAMP always refers to this specific Georgia licensing exam, not any other credential that happens to share the same letters.

The exam is a gateway, not a formality. It's a 168-item, two-part computer-based test built to confirm that a candidate can plan, install, test, repair, and manage plumbing work at the highest license tier the state offers. If you're mapping out your path to licensure, our overview of GAMP Certification and the companion piece on What Is GAMP Certification? both dig further into how the credential fits into a Georgia plumbing career.

Who Governs and Administers the Exam

The exam falls under the Georgia State Division of Master and Journeyman Plumbers, which operates within the Georgia Construction Industry Licensing Board. That board sets the licensing rules, experience thresholds, and renewal cycle. The actual exam delivery - scheduling, test-center logistics, and scoring - is handled by PSI, a third-party testing vendor that administers the computer-based exam.

This two-layer structure matters for candidates: the Division/Board decides who is eligible and what the license means, while PSI decides how and where you sit for the test itself. If you're still confirming basic terminology before diving into prep, see What Is GAMP?, GAMP Meaning, and What Does GAMP Stand For? for related definitional context.

Exam Format and Structure

The Class II Unrestricted exam is computer-based and closed book. It consists of:

• 140 scored multiple-choice questions that count toward your result
• 28 unscored pretest questions mixed in to evaluate future exam content - you won't know which items are which
• Two parts, each 3.5 hours long, for a total testing time built around a full-day session
• A silent, nonprogrammable calculator permitted for the calculation-heavy domain

To pass, you need a final scaled score of 70. For the exact mechanics of how raw answers convert to that scaled number, see our dedicated breakdown at GAMP Passing Score 2026: Exactly What You Need to Pass. If you're deciding when to schedule, the timelines and testing windows are covered in GAMP Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

The 12 Exam Domains

Every question on the GAMP maps to one of twelve content domains, each weighted differently. Understanding the weighting is the single most useful thing you can do before opening a study guide, because it tells you exactly where your time is best spent.

Four domains - Regulations, Maintenance and Repair, Safety-related Issues, and Business Laws - each carry 10.71%, meaning together they represent nearly half the scored exam when combined with Administrative Requirements. That's a lot of weight sitting outside the hands-on installation content, which surprises candidates who assume the test is purely technical. For a domain-by-domain breakdown of what to actually study within each area, read GAMP Exam Domains 2026: Complete Guide to All 12 Content Areas.

Eligibility Requirements

Under the licensing law effective July 1, 2026, applicants need five years of full-time plumbing experience before sitting for the Class II Unrestricted exam. How that experience breaks down depends on your Journeyman history:

• Candidates licensed as a Georgia Journeyman Plumber before March 1, 2025 need only two years of that five-year total logged as a Journeyman.
• Candidates who became Journeymen later need four years as a Journeyman within the five-year total.
• Regardless of path, at least two years of the qualifying experience must be in unrestricted Class II work.

Beyond the experience math, the application package requires supervisor affidavits verifying your work history, identity and lawful-presence documents, and a background check. None of these are optional add-ons - incomplete documentation is one of the most common reasons applications stall before a candidate ever reaches the testing room. For the full checklist and timing considerations, see GAMP Requirements 2026: Eligibility, Prerequisites & How to Qualify.

Code References and Study Materials

Code editions matter enormously on a licensing exam like this one, and they change. For exams administered beginning May 1, 2026, GAMP content is based exclusively on the 2024 Georgia Plumbing Code and the 2024 Georgia Gas Code, including Georgia-specific amendments to each. Studying from an outdated code cycle - even a recent one - can leave you memorizing answers that no longer align with what's tested.

Because the exam is closed book, you can't bring these codes into the testing room, but a silent nonprogrammable calculator is allowed for the calculation-heavy Domain 9 questions covering offset, volume, area, pressure, depth, circumference, radius, weight, and related quantities. Practicing calculations by hand with the same type of calculator you'll use on test day removes one variable from an already high-stakes situation.

If you want a condensed reference to keep the key code points, scoring rules, and domain weights in one place while you study, GAMP Cheat Sheet 2026: One-Page Review of Must-Know Facts is built for exactly that kind of last-mile review.

What Happens If You Don't Pass

Not every candidate clears the scaled score of 70 on the first attempt, and Georgia's rule for repeat attempts is specific: after two failures, you're required to complete a Board-approved review course before you're permitted to test again. This isn't a suggestion - it's a procedural requirement built into the licensing pathway, and it means your second attempt should be treated with real weight rather than as a casual retry.

If you're trying to gauge realistically how difficult this exam is before you commit to a test date, How Hard Is the GAMP Exam? Complete Difficulty Guide 2026 walks through the factors that make certain domains harder than others, and GAMP Pass Rate 2026: What the Data Shows puts the retake requirement in broader context.

Renewal and Continuing Education

Passing the exam and receiving your license isn't the end of the obligation. Georgia master plumber licenses renew by November 30 of even-numbered years, and each renewal cycle requires 8 continuing-education hours. Building CE tracking into your calendar from the day you're licensed avoids the scramble that comes with realizing a renewal deadline is close and hours haven't been logged.

Who Pursues a GAMP and Why

Because Class II is an unrestricted license, the plumbers pursuing this credential are typically those who want the broadest possible scope of authorized work - running their own plumbing business, supervising crews on unrestricted commercial or residential jobs, or qualifying to pull permits and sign off on installations without scope limitations. Journeymen already working toward the Class II threshold, and plumbing company owners who need a licensed master on staff, make up the bulk of candidates.

Employers value the unrestricted designation because it removes the need to route certain jobs through a separately licensed master plumber. For candidates weighing whether the time and experience investment pays off, Is the GAMP Certification Worth It? Complete ROI Analysis 2026 and GAMP Salary Guide 2026: Complete Earnings Analysis look at the career-side considerations, while GAMP Jobs covers the kinds of roles that specifically call for this license. Georgia-focused training programs are outlined in GAMP Training.

Building a Domain-Based Study Plan

Generic study techniques only help if they're pointed at the right material. Given that Domain 5 (Perform Plumbing Systems Installation Activities) carries the heaviest weight at 15%, and four other domains sit at 10.71% each, a sensible plan front-loads the biggest-weight domains early, while momentum and study time are highest, and saves lighter domains like Domain 1 (3.57%) and Domain 9 (3.57%) for shorter review passes near the end.

For a more complete week-by-week methodology, including how to build practice-question rotations around this weighting, see GAMP Study Guide 2026: How to Pass on Your First Attempt. Running timed practice sessions on GAMP Exam Prep's practice tests before test day is one of the few ways to simulate the two 3.5-hour parts under real conditions, and repeating that practice on our practice platform as your exam date approaches helps confirm your pacing across both sessions.

FAQ