How can I achieve automatic update of the IP Geo Location database?

Have a Big-IQ:

 

https://support.f5.com/csp/article/K22650515

https://clouddocs.f5.com/products/big-iq/mgmt-api/v7.1.0/ApiReferences/bigiq_public_api_ref/r_device_geoip_update_manager.html

 

 

Or learn scripting and you can automate most things on F5 using its REST-API:

 

POST tm/sys/geoip

 

https://cdn.f5.com/websites/devcentral.f5.com/downloads/icontrol-rest-api-user-guide-14-1-0.pdf