Answer:

Gateway files are created in the working directory where the Gateway binary (e.g. gateway2.linux_64) has been executed.

Some examples of the Gateway files:

• licences.cache - It contains the license info. In case there is a disconnection to license daemon, the gateway can continue function. 
• cache - cache folder for the Gateway process
• gateway.user_assignment - user assignment data file
• gateway.snooze - file contains info of snoozed items

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