You must set up the Salesforce interation before setting up the Salesforce Lightning integraiton.
To set up the integration:
In Gong, go to Company settings > Data capture > Telephony systems.
Click + Telephony System.
Click CONNECT.
Note
To capture the best possible sound quality on calls imported to Gong, we recommend that you ask your Salesforce Lightning CSM to enable stereo call recording for you.