Bosch GPL100-30G Green-Beam Three-Point Self-Leveling Alignment Laser

Key Features

Fast Point TransferThis Bosch point laser projects three plumb and level points so you can transfer reference marks up, down, and across without dragging out a manual plumb bob. Bright Green BeamGreen-beam output is rated up to 4X brighter than standard red beams, which makes point visibility easier indoors and in tougher lighting. Built for JobsitesA full rubber overmold, pendulum lock, IP65 protection, and integrated magnetic mount help this laser hold up better on active jobs where bumps, dust, and repositioning are part of the day.

Overview

The Bosch GPL100-30G Green-Beam Three-Point Self-Leveling Alignment Laser is a compact layout tool built for fast plumb, level, and point-transfer work on interior jobsites. This is a point laser designed for plumb, level, and alignment layout tasks. Model Number: GPL100-30G. If you need to transfer a point from floor to ceiling, line up framing locations, or establish level references without fighting with string lines, this tool is made for that kind of work.

The big draw here is the three-point projection layout. Bosch rates it at ±1/8 in. accuracy at 30 ft., which matters because layout errors stack up fast once walls, ceiling tracks, pipe runs, or fixture locations start getting installed. The tool throws one horizontal point and two vertical points for up/down plumb, level, 90-degree alignment, and grade-point transfer. With a stated working range of up to 125 ft., it has enough reach for room layout, framing, mechanical rough-in, and punch-list alignment work in larger indoor spaces.

Green-beam output is another practical advantage. Bosch states the beam is up to 4X brighter than standard red beams, which makes the reference points easier to pick up indoors, especially when the room is not fully dark or when you are working across a longer span. Bosch also builds in VisiMax technology, which manages power use to help keep the beam visible while extending battery life. That is the kind of feature you appreciate on a long day when the laser stays on and gets moved around constantly.

The self-leveling system is set up for real jobsite use, not just bench-top accuracy. The Smart Pendulum System automatically self-levels up to 4 degrees and indicates when the tool is out of level. Once the laser is switched off, the pendulum locks for transport. That lock matters because layout tools tend to get tossed in gang boxes, truck seats, and hard cases, and a protected pendulum gives you a better shot at long-term accuracy.

Bosch also did the right things on durability and handling. The housing uses a full rubber overmold to protect major impact points, and the laser carries an IP65 rating, meaning it is dust tight and protected against water jets. For a layout tool that may sit on a slab, ride on steel studs, or move from rough framing to finish work, that level of protection is worth paying attention to. At just 0.77 lb and roughly 4.5 in. long, 4.5 in. high, and 2 in. wide, it is easy to carry and easy to park where you need it.

Mounting is another strong point. The integrated multipurpose mount uses strong magnets for attachment to metal surfaces and also supports 1/4 in.-20 threaded mounting. That gives you more than one way to position the laser depending on the space. You can stick it to steel framing, mount it to a tripod, or pair it with Bosch accessories such as the BT 150 tripod, BP350 telescoping pole system, BM 1, BM3, LB10, and MM 2. That flexibility is a real time-saver when the layout point you need is not at a convenient height.

This Bosch GPL100-30G Green-Beam Three-Point Self-Leveling Alignment Laser makes the most sense for framers, electricians, plumbers, drywall installers, general contractors, remodelers, and serious DIY users who need accurate point transfer more than they need a cross-line laser. It is especially useful for ceiling-to-floor alignment, wall layout, vent and pipe penetrations, stud and track positioning, and interior reference work where a compact plumb-point laser is faster than traditional methods.

Lay Out Plumb Points Faster

When you are laying out walls, transferring marks, or checking vertical alignment, speed matters just as much as accuracy. This laser cuts out the back-and-forth of old-school plumb transfer and gives you a clean point reference where you need it.

• Three-point projection for plumb, level, 90-degree, and grade-point work
• Rated to ±1/8 in. accuracy at 30 ft. for dependable layout
• Up to 125 ft. working range for larger interior spaces

Mount It Where the Work Is

A good layout laser is only useful if you can place it quickly and trust it to stay put. The integrated mount gives this unit more placement options than a basic floor-only setup, which helps when the reference point is on steel, overhead, or off the slab.

• Integrated multipurpose mount with magnets for secure attachment to metal surfaces
• 1/4 in.-20 threaded mounting for tripod and accessory compatibility
• Works with Bosch BT 150, BP350, BM 1, BM3, LB10, and MM 2 accessories

Bosch GPL100-30G Green-Beam Three-Point Self-Leveling Alignment Laser Durability

Layout tools live a rough life. Bosch gave this one the features you want if it is going in and out of a truck, riding in a case, and getting repositioned all day.

• Full rubber overmold helps protect major impact points
• Smart Pendulum System self-levels and locks for transport when powered off
• IP65 rating helps it stand up to dust and water exposure on the job

What’s in the Box

• (1) Bosch GPL100-30G Green-Beam Three-Point Self-Leveling Alignment Laser
• (1) Built-in multipurpose mount
• (2) AA batteries
• (1) Hard carrying case

Key Specifications

Laser Type	Three-point self-leveling point laser
Accuracy	±1/8 in. at 30 ft.
Working Range	Up to 125 ft.
Beam Color	Green
Number of Beams	3
Self-Leveling Range	Up to 4°
Mount Thread	1/4 in.-20
IP Rating	IP65
Weight	0.77 lb
Length	4.5 in.
Width	2 in.
Height	4.5 in.

Compatibility

Threaded Mounting Uses a 1/4 in.-20 thread for tripod and mounting accessory connection. Bosch Accessories Works with Bosch BT 150 tripod, BP350 telescoping pole system, BM 1, BM3, LB10, and MM 2 mounts and positioning devices. Magnetic Positioning Integrated multipurpose mount can attach to suitable metal surfaces for fast placement during framing and layout work.

Built For

ConstructionGeneral ContractingRemodelingElectricalPlumbingDrywallInterior FramingDIY / Hobbyist

Pro Tip

If you are transferring ceiling or roof penetration points, stick the magnetic mount to nearby steel or set the unit on a stable reference surface first, then let the pendulum settle before marking. You will get faster, cleaner point transfer than trying to chase a manual plumb bob in an open room.

Warranty & Support

Bosch measuring and layout tools are covered by a one-year limited warranty, with an additional year available when the tool is registered within eight weeks of purchase.

Tool Nut’s Take

Tool Nut’s Take

A smart pick for fast plumb-point layout

The Bosch GPL100-30G Green-Beam Three-Point Self-Leveling Alignment Laser does exactly what a good point laser should do: give you bright, quick, accurate reference points without slowing down the job.

• Who it’s for: Contractors and serious DIY users doing framing, plumbing, electrical, drywall, and interior layout where point transfer matters more than projecting full lines.
• Why it stands out: The combination of green-beam visibility, three-point projection, magnetic mounting, and IP65 protection makes it more job-ready than a basic homeowner-grade laser.
• Worth knowing: This is a point laser, not a cross-line model, so buy it for plumb and alignment transfer work. If that is your job, this style is often faster and cleaner than a line laser.

Common Questions

• What type of laser is this? It is a three-point self-leveling point laser designed for plumb, level, 90-degree, and grade-point alignment work.
• How far does it work? Bosch lists a working range of up to 125 ft.
• Does it self-level? Yes. The Smart Pendulum System self-levels up to 4 degrees and indicates when the tool is out of level.
• Can it mount to a tripod or metal surface? Yes. It has an integrated multipurpose mount with magnets and a 1/4 in.-20 threaded mount.
• Is it protected for jobsite conditions? Yes. It has a full rubber overmold housing and an IP65 rating for dust and water protection.