GateRook adds one server to Antigravity's MCP config, ~/.gemini/config/mcp_config.json. Choose how Antigravity signs in: with a token only for Antigravity written to that file, or through your browser, with no token in the file.
Before you start, install GateRook and Antigravity. The screenshots come from a local test setup with one MySQL connection, mysql-demo, on the default endpoint. Your connections and endpoint address can differ. Select a screenshot to open it at full size.
1. Choose Antigravity and select Connect
Open GateRook and go to AI apps. GateRook lists the AI apps it finds on this computer. Next to Antigravity, select Connect.
2. Choose how Antigravity signs in and confirm
Under Sign-in, keep Token in the file to write a token only for Antigravity into ~/.gemini/config/mcp_config.json. Name it and choose when it expires. To keep the token out of the file, choose Sign in through the browser. Then select Connect Antigravity.
In Antigravity, open Installed MCP Servers and refresh the list to load gaterook-default. With browser sign-in, allow the sign-in in GateRook when Antigravity opens your browser.
3. Check the connection with a prompt
Under Check that it works, GateRook suggests a prompt for your first connection, here Show me the tables in mysql-demo. Open a new chat in Antigravity and ask it.
Antigravity answers through GateRook's tools. Reads run at once, changes wait for you in Approvals, and every request appears in Activity with the token name.
Next, give Antigravity more to work with: add a database, logs, a cloud account or an MCP server.