For CentOS 9 Stream run the following as root:
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/home:buluma/CentOS_9_Stream/home:buluma.repo
yum install python3-gobject
For CentOS 8 Stream run the following as root:
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/home:buluma/CentOS_8_Stream/home:buluma.repo
yum install python3-gobject
For CentOS 7 run the following as root:
cd /etc/yum.repos.d/
wget https://download.opensuse.org/repositories/home:buluma/CentOS_7/home:buluma.repo
yum install python3-gobject