$ sudo apt-get update
$ sudo apt-get install gnupg1-curl 

gnupg1-curl is installed in your system.

Make ensure the gnupg1-curl package were installed using the commands given below,

$ sudo dpkg-query -l | grep gnupg1-curl *

You will get with gnupg1-curl package name, version, architecture and description in a table

gnupg1-curl package basic information: