See https://github.com/geany/geany-plugins/tree/master/autoclose
Thanks for the info but I found it difficult to install such a plug-in. Would you consider adding native support for auto-close angle brackets? Parentheses, square brackets, curly brackets, and angle brackets are the four types of bracket, and Geany already supports three of them.
It is very easy to install plugins
For windows version you just need to go here [https://www.geany.org/download/releases/%5D(https://www.geany.org/download/r...) to download the .exe plugin installer and just double click to run it. 
For ubuntu os just simply run `sudo apt-get install geany-plugins` and debian os is `apt-get install geany-plugins` 
Full list of linux os command to download geany plugins can simply find here: [https://plugins.geany.org/install.html%5D(https://plugins.geany.org/install....)