Can I upload database backup made through cPanel into phpmyadmin? I have been using mybb forum software. As, I use shared hosting so they had provided me cPanel. Through it I had make a backup which is a .gzip file.

Now, my query here is that I want to upload it to another server to do some experiments with my forum. Can I upload the file through phpmyadmin? As my server has no cPanel installed. Will it work?
I've just checked and yes, the gzipped file is a standard mysql dump, so you can import it from PhpMyAdmin (given that the MySQL versions are compatible, of course).

The backup doesn't contain the CREATE SCHEMA statement, so you have to create the db first, and then import the backup into it.