Yes, there is free WiFi at Lima Airport (Jorge Chávez International Airport). It is available throughout the airport, including in the public areas and in the restricted waiting areas.
To connect to the free WIFI, simply select the network called FreeAeropuertoGTD. No password is required.
There is no time limit on the free WIFI, so you can use it for as long as you need.
Please note that the speed and reliability of the free WIFI may vary depending on your location in the airport and the number of people using it.