Is there any way to modify the response from a url specific to a geolocation?

I have a website that has a calendar, i want the users from, for example : UK to be able to see the available days from the UK URL, if someone outside UK accesses the UK url i want to edit the response for the calendar so the calendar appears that no day is available, is this possible in fortiweb?

i don't want for it to go to a error page, just edit the response for the calendar to appear empty to mitigate bots and attacks from fully bookin the calendar.

i know we can redirect but i want a response rewrite, i'm using a version below 7.6 i heard 7.6 has this function but i can't find official documentation to prove to my customer to upgrade the fortiweb.

thank you,