List of best mirrors for IP address 52.15.191.241, located in an unknown country.
I am very sorry, but no mirror was found. Feel free to download directly:
http://mirrordirector-mb.raspbian.org/raspbian/pool/main/g/gtk4/libgtk-4-dev_4.8.3+ds-2+rpi1+deb12u1_armhf.deb