On the gym description says: gym builds and packages iOS and macOS apps for you. It takes care of all the heavy lifting and makes it super easy to generate a signed ipa or app file. I can't search in documentation how to export .app file. I need the .app file and path to start the calabash tests in my jenkins CI.
We are planning on supporting .ipas in the Calabash iOS tool chain. Until then, use ditto to unzip the .ipa.
$ xcrun ditto -xk path/to/Your.ipa ./
$ mv ./Payload/Your.app path/to/somewhere/else