The Gladiator GearBox is a 28-inch full-door steel cabinet that stacks and combines into a full garage system. At about $240 for one cabinet it is ready-to-assemble, not welded, so you build the box in under an hour. It locks, hides clutter behind a full door, and ties into the wider Gladiator lineup of wall units and rails. It is the modular, buy-as-you-go pick, where a welded set is a bigger one-time spend.
Part of our garage storage guide.
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Our Verdict
The Gladiator GearBox is the cabinet to buy when you want to build a garage system one piece at a time. Each 28-inch cabinet is solid modular steel, locks with a full door, and stacks with wall units and workbenches from the same line. It is ready-to-assemble, so you build it, and one cabinet at $240 adds up over a full wall. For a flexible system you grow into, few lines match Gladiator.
Buy It If
- You want to build a cabinet system one piece at a time
- You want to tie into the wider Gladiator garage system
- You want a locking full-door cabinet to hide and secure gear
Skip It If
- You want a complete welded wall in one purchase
- You do not want to assemble ready-to-assemble steel
Gladiator GearBox Cabinet Specs
| Spec | Detail |
|---|---|
| Model | GAGB28FDYG, full-door GearBox |
| Width | 28 in, modular and stackable |
| Build | Ready-to-assemble steel |
| Finish | Powder-coated steel |
| Door | Full door with locking handle |
| System | Stacks with Gladiator wall units, benches, and rails |
| Price | $240, checked July 2026 |
What It Is and Setup
The Gladiator GearBox is a 28-inch modular steel cabinet with a full locking door. It is the building block of the Gladiator garage system, meant to stack and combine with wall cabinets, workbenches, and the brand rail systems. One cabinet organizes a corner; several build out a whole wall.
It ships ready-to-assemble, so setup is a build. You put the steel box together from panels with basic tools, which takes 30 to 60 minutes per cabinet. That is more work than a welded unit, but it keeps the shipment manageable and the price per cabinet down.
Once built, level it and, for tall or stacked units, anchor the top to the wall for stability. The adjustable shelves set where you want them, and the full door closes over everything for a clean, locked front.
In Use
In daily use the GearBox does the two things a garage cabinet should: it hides clutter and it locks. The full door closes over the shelves so the wall looks tidy, and the locking handle keeps tools and chemicals away from kids or out of a shared garage. The powder-coated steel takes knocks without showing them.
The modular design is what sets Gladiator apart. Start with one cabinet, then add wall units above, a workbench beside, or a rail system on the open wall, all from the same line, so the pieces match. You build the garage you want in steps rather than committing to a full set on day one.
The adjustable shelves make the space flexible. Set them tight for small parts bins or wide for power tools and fluids, and rearrange as your needs change. For a cabinet you assemble yourself, it feels solid and organized once it is loaded and on the wall.
Gladiator vs Other Cabinets
The GearBox competes with complete welded sets like NewAge Bold and with budget flat-pack cabinets. Against NewAge it trades a finished welded wall for modular, buy-as-you-go flexibility and a lower entry price. Against budget cabinets it costs more but brings the Gladiator system and a sturdier build than the thin-steel options.
| Spec | Gladiator GearBox | NewAge Bold Series | Budget RTA |
|---|---|---|---|
| Build | Ready-to-assemble | Fully welded | Flat-pack RTA |
| Format | Single cabinet, modular | Complete 9-piece set | Varies |
| System | Wide Gladiator system | NewAge set | None |
| Lockable | Yes, full door | Yes | Sometimes |
| Price | About $240 each | About $1,800 set | Lowest |
| Best for | Buy-as-you-go system | Finished welded wall | Tight budget |
Choose Gladiator to build a system over time and tie into their rails and benches. For a complete welded wall in one purchase, read our NewAge Bold Series review. Either way, the garage cabinets guide lines up the options by budget and build.
Long-Term Durability
The GearBox holds up well for a ready-to-assemble cabinet. The powder-coated steel resists the damp and chemicals of a garage, and the door and handle are the parts that see the most use. Built square and anchored, the cabinet stays solid for years of normal loading.
The one caution with ready-to-assemble steel is the build. A cabinet put together loose or out of square will not feel as solid as a welded one, so take the time to align the panels and snug every fastener. Done right, the GearBox is a cabinet you keep, and the modular design means you can add to it rather than replace it.
Related reviews: Gladiator GearTrack review.
Who It Is For
Buy the Gladiator GearBox if you want to build a garage cabinet system one piece at a time and tie into a wider system of wall units, benches, and rails. It fits owners who would rather spread the cost and grow the setup than buy a full set at once, and who do not mind assembling ready-to-assemble steel. If you want a finished welded wall in one purchase, a complete set like NewAge Bold is the better fit.
Frequently Asked Questions
Do Gladiator GearBox cabinets require assembly?
Yes. The GearBox is ready-to-assemble, so you build the steel box from panels rather than lifting a welded unit into place. Most cabinets take 30 to 60 minutes with basic tools. It is more work than a welded set, and the tradeoff is a lighter shipment and a lower price per cabinet.
Are Gladiator cabinets modular?
Yes, and that is the appeal. GearBox cabinets stack and combine with Gladiator wall cabinets, workbenches, and the GearTrack and GearWall rail systems. You start with one cabinet and grow the setup over time, all within one system where the parts fit together.
How much does a Gladiator GearBox hold?
The cabinet and its adjustable shelves carry typical garage loads of tools, fasteners, and supplies. Keep the heaviest items low and spread across the shelves rather than piling one shelf, and stay within the shelf ratings. Anchoring tall stacks to the wall adds stability.
Gladiator vs NewAge cabinets, which is better?
Gladiator is modular and ready-to-assemble, so you build a system one cabinet at a time and tie into their rail and bench lineup. NewAge Bold is a complete welded set that arrives finished. Pick Gladiator to grow over time, and the NewAge Bold Series for a finished welded wall at once.
Can I lock the Gladiator GearBox?
Yes. The full-door GearBox has a locking handle, so you can secure tools, chemicals, and anything you want kept away from kids or out of sight. The full door also hides the contents entirely, which keeps the wall looking tidy.
Why you can trust Garage Loadout
Specs above come from Gladiator documentation and the product listing, and the price was checked against the live Amazon listing in July 2026.