This article explains the sync times for CRM data to Gong for supported integrations such as Salesforce, Hubspot and MS Dynamics.
Gong's fast sync time means that in most cases, you will see changes you made in your CRM in Gong less than half an hour after making the change.
The time it takes to sync the data depends on the volume of, and type of activity in your account. Companies which have a large volume of activity, or perform many changes to the deal/opportunity admin details such changing as the deal owner, may take up to two hours until the changes are visible in Gong.
Changes that are related to the configuration of the integration, such as adding fields that are imported can take longer to be available in Gong.