How to put codes inside " " these things ? Like I want to put gv(Month) inside wg(".....", text) in the website adress

You can do something like:

$wg(“https://api.aladhan.com/vl/calendarByCity/2024/(” + gv(Month) + “)?city=…method=1”, txt)$

A good source on how to manipulate strings can be found here.