G2 — Chip Design AI Platform

G2 is a web-based workspace for running and tracking chip design flows, from RTL to signoff. It runs locally on your Linux machine. You work in a browser, and G2 manages projects, blocks, libraries, design data and tool runs for you.

Three implementation runs of gcd compared in the Impl Status view: floorplan, die size, density, runtime and timing for each scenario, side by side.

This package is the Community Edition. It ships with everything needed to run a complete open-source flow:

Bundled	Contents
EDA tools	OpenROAD, OpenSTA, Yosys (+ yosys-slang), Verilator, Magic, Netgen
PDKs	Nangate45, SkyWater 130 (sky130), ASAP7
Demo cases	Ready-to-run examples for each PDK
Runtime	Tcl and Node.js. You don't need a system-wide install.

Video Tutorials

New to G2? The Getting Started series on YouTube goes from download to a routed block with signoff timing in about 27 minutes.

#	Video	Length
0	Trailer: G2 in one minute	1:13
1	Install and launch	3:07
2	Build a Nangate45 demo project in one command	3:55
3	RTL to GDS with Yosys, OpenROAD and OpenSTA	6:16
4	Design Data Management (DDM)	2:26
5	Compare implementation runs side by side	4:15
6	Debug timing paths with tpath	2:19
7	AI assistant for chip design flows	3:09

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Requirements

Operating system

OS	G2 platform	Bundled open-source EDA tools
Ubuntu 22.04 / 24.04 / 25.04	✅ Tested	✅
Rocky / RHEL 8 or later	✅	❌ (needs glibc 2.35+)

The G2 platform itself runs on Rocky/RHEL 8 or later. The bundled OpenROAD, Yosys and Verilator binaries need glibc 2.35 or later, which means Ubuntu 22.04 or later. You only need Ubuntu if you plan to run the bundled open-source flows.

System packages

G2 uses these standard command-line tools: xterm, tcsh, gvim, firefox, tclsh, nproc, zcat.

On Ubuntu:

sudo apt-get install -y xterm tcsh vim-gtk3 firefox tcl coreutils gzip

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Quick Start

# 1. Download and extract (about 530 MB). There is no install step.
wget https://github.com/DeepDataFlow/G2/releases/download/v1.0.0/G2_v1.0.0.tar.gz
tar zxvf G2_v1.0.0.tar.gz

# 2. Create a workspace next to the extracted package and initialize it
mkdir g2
cd g2
../G2_v1.0.0/g2/bin/g2init

# 3. Load the environment and start the server
source g2.rc
g2

g2 opens an xterm that runs the G2 server. The xterm prints a login URL like this one:

Open this URL to authenticate:
  http://localhost:6003/?token=xxxxxxxx

Open that URL in Firefox (firefox &). You'll see the G2 home page.

Prefer to watch? Tutorial #1 walks through these steps.

Next: get a project to work on

There are two ways to start. Both give you the gcd and spm blocks with signoff scenarios and libraries already set up.

Follow the video series (Nangate45). One script builds the demo project that the tutorials use. It takes a few seconds:

$G2_ROOT/demo_case/nangate45/build.sh

Refresh the G2 home page, and the nangate45 project appears. Then follow Tutorial #2 for a tour of the project and Tutorial #3 to run the flow. The same script exists for sky130 and asap7 under $G2_ROOT/demo_case/.

Start from a complete project (sky130). Clone G2_demo_sky130 into your workspace. It adds pre-configured flows for a v01 run and reference QoR to compare your runs against.

cd $G2_SYS/projs
git clone https://github.com/DeepDataFlow/G2_demo_sky130
cd G2_demo_sky130
make setup

See the G2_demo_sky130 README for details.

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What the Setup Commands Do

Step	What happens
g2init	Turns the current directory into a G2 workspace ($G2_SYS). It picks a free port starting at 6003, creates projs/, server/ and tmp/, and writes g2.rc.
source g2.rc	Sets G2_ROOT and G2_SYS and adds G2 and the bundled EDA tools to PATH. It works with both bash and tcsh.
g2	Starts the G2 web server in an xterm. The server listens on 127.0.0.1 only, so other machines can't reach it.

Options:

g2init -port 6100     # use a specific port instead of auto-selecting one
g2 --no-auth          # start without the login token (localhost only)

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Everyday Use

Each time you open a new shell:

cd g2            # your workspace
source g2.rc
g2

Stop the server by closing its xterm. Your data stays in the workspace directory.

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Troubleshooting

Symptom	Fix
g2: command not found	Run source g2.rc from inside the workspace.
No window appears after g2	Install xterm and make sure $DISPLAY is set.
The browser asks for a login or shows "unauthorized"	Use the full ?token=... URL printed in the G2 xterm.
version `GLIBC_2.35' not found	The host OS is too old for the bundled EDA tools. Use Ubuntu 22.04 or later.
The port is already in use	Re-run g2init -port <port> with a free port.