What Is GAMP?

Quick Definition: GAMP (Class II Unrestricted) is the Georgia Master Plumber licensing exam administered by PSI on behalf of the Georgia State Division of Master and Journeyman Plumbers. Passing it, combined with meeting experience and application requirements, qualifies a plumber for an unrestricted master license in Georgia.

Who Governs and Administers the Exam

The GAMP credential sits under the Georgia State Division of Master and Journeyman Plumbers, which itself operates within the Georgia Construction Industry Licensing Board. The Division sets the licensing rules and eligibility standards; the actual computer-based test is delivered by PSI, a third-party testing vendor that administers the exam at approved test centers. This two-layer structure - state regulatory board plus testing administrator - is typical of professional licensing in construction trades, and it's worth knowing because your application paperwork goes through the Division while your exam scheduling and score reporting go through PSI.

For a full walkthrough of what this credential entails beyond the basic definition, see GAMP Certification and the companion piece on What Is GAMP Certification?.

Exam Format and Question Style

The Class II Unrestricted exam is a computer-based test made up of 140 scored multiple-choice questions plus 28 additional unscored pretest questions mixed in without identification. You won't know which questions count toward your score and which are being field-tested for future exams, so every question deserves full attention. The exam is split into two parts, each allotted 3.5 hours, meaning candidates should plan for a full-day testing appointment.

To pass, you need a final scaled score of 70. Scaled scoring means your raw number of correct answers is converted onto a standardized scale, so the passing threshold isn't simply "70 questions correct out of 140." For a deeper breakdown of how scoring works and what a 70 actually represents, read GAMP Passing Score 2026: Exactly What You Need to Pass.

The 12 GAMP Exam Domains

The exam content is organized into twelve domains, each weighted differently. Knowing these weights lets you prioritize study time toward the areas most likely to appear on test day rather than spreading effort evenly across topics that carry very different point values.

Domain	Weight
1. Comply with General Laws	3.57%
2. Comply with Regulations	10.71%
3. Work Planning/Organizing	5%
4. Perform Pipe Cutting and Joining Activities	7.14%
5. Perform Plumbing Systems Installation Activities	15%
6. Perform System Testing Activities	5%
7. Perform Maintenance and Repair Activities	10.71%
8. Safety-related Issues	10.71%
9. Calculations (Offset, Volume, Area, Pressure, Depth, Circumference, Radius, Weight)	3.57%
10. Comply with Business Laws	10.71%
11. Comply with Administrative Requirements	10.71%
12. Plumbing System Design	7.14%

Notice that four domains - Regulations, Maintenance and Repair, Safety, Business Laws, and Administrative Requirements - each sit at 10.71%. Combined, these regulatory and business-focused domains represent a larger share of the exam than most candidates expect from a "hands-on trade" test. A candidate who only drills pipefitting and installation mechanics while skimming business law and administrative requirements is leaving a substantial portion of the exam under-prepared. For a domain-by-domain breakdown with study focus for each of the twelve areas, see the GAMP Exam Domains 2026: Complete Guide to All 12 Content Areas.

Eligibility and Application Mechanics

Georgia's licensing law effective July 1, 2026 sets specific experience thresholds for Class II Unrestricted eligibility. Applicants need five years of full-time plumbing experience overall. The path to that total depends on when you became a licensed Georgia Journeyman Plumber:

• Journeymen licensed before March 1, 2025 need only two of their five years to have been served as a Journeyman.
• Journeymen licensed on or after that date need four years as a Journeyman.
• Regardless of path, at least two years of experience must be in unrestricted Class II work.

Beyond the years-of-experience calculation, the application package requires supervisor affidavits verifying your work history, identity and lawful-presence documentation, and a background check. None of this paperwork is optional, and gathering affidavits from past supervisors often takes longer than candidates expect - it's worth starting that process well before you intend to sit for the exam. A full eligibility breakdown, including edge cases for experience timing, is covered in GAMP Requirements 2026: Eligibility, Prerequisites & How to Qualify.

Which Codes You're Tested On

Code editions matter enormously on a licensing exam like this, because plumbing codes are revised periodically and a question written against an outdated edition can cost you points even if your real-world knowledge is sound. For exams administered beginning May 1, 2026, GAMP content is based exclusively on the 2024 Georgia Plumbing Code and the 2024 Georgia Gas Code, both with Georgia's state amendments. If you're studying with an older code book or a national base code without checking for Georgia-specific amendments, you're studying the wrong reference material.

Make sure any practice questions, study guide, or review course you use explicitly references the 2024 editions with Georgia amendments - not a prior code cycle or an unamended national version.

Class II Unrestricted Scope

Class II is the unrestricted tier of Georgia's master plumber license structure. Where some plumbing license classes limit the type, size, or category of work a licensee may legally perform, Class II carries no such restriction. That breadth is exactly why the exam blueprint spans installation, repair, system design, testing, safety, and business/administrative compliance rather than narrowly focusing on one type of plumbing work. Passing the Class II Unrestricted exam signals to employers and clients that you're qualified across the full range of plumbing scope recognized under Georgia law.

Who Takes the GAMP Exam

Candidates sitting for GAMP are almost always experienced Georgia Journeyman Plumbers who have already accumulated the required years of full-time field experience and are ready to step into ownership, supervisory, or fully licensed contracting roles. Typical reasons candidates pursue the credential include:

• Starting or expanding a licensed plumbing contracting business in Georgia
• Qualifying to pull permits and supervise crews without scope restrictions
• Meeting employer or bonding requirements that call for a Master-level license holder on staff

If you're evaluating whether pursuing this license fits your career trajectory, the analysis in Is the GAMP Certification Worth It? Complete ROI Analysis 2026 and the broader outlook in GAMP Jobs walk through how the credential is used in the field. Compensation expectations tied to holding an unrestricted master license are discussed qualitatively in the GAMP Salary Guide 2026: Complete Earnings Analysis.

A Domain-Aware Prep Approach

Rather than a generic study calendar, build your prep schedule around domain weight and code source. Early weeks should target the heaviest domains - Systems Installation (15%), and the cluster of Regulations, Maintenance and Repair, Safety, Business Laws, and Administrative Requirements (10.71% each) - since together these make up well over half the scored questions. Save the lighter-weight domains like General Laws, Work Planning, Testing Activities, and Calculations for focused, shorter review sessions closer to your test date, using them as reinforcement rather than primary study blocks.

For a complete week-by-week plan built around this exact weighting logic, see the GAMP Study Guide 2026: How to Pass on Your First Attempt. If you want a fast reference for last-minute review, the GAMP Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses the highest-yield facts into one page. And when you're ready to test your readiness under realistic conditions, our practice test platform mirrors the two-part, multiple-choice format you'll face at the PSI test center.

Before committing to a test date, it also helps to understand realistic difficulty expectations and how candidates typically perform. See How Hard Is the GAMP Exam? Complete Difficulty Guide 2026 and GAMP Pass Rate 2026: What the Data Shows for context, and review the GAMP Certification Cost 2026: Complete Pricing Breakdown and GAMP Exam Dates 2026: Testing Windows, Deadlines & Scheduling pages when you're ready to budget and schedule.

After You Pass: Renewal Basics

Passing the exam and completing licensure isn't the end of the compliance timeline. Georgia master plumber licenses renew by November 30 of even-numbered years, and each renewal cycle requires 8 hours of continuing education. Building this into your long-term planning now - rather than scrambling near a renewal deadline - keeps your unrestricted Class II license active without lapse.

If you're still mapping out whether you meet the underlying eligibility path before you even get to renewal, revisit the requirements breakdown, since experience-year calculations differ depending on when you were licensed as a Journeyman.

Frequently Asked Questions