Creating bash script to backup files from several directories

Could someone help me to create bash script wich will be run with cron once every night.
I want to put script in xxx folder, execute with cron and result should be in same folder.
Script is going to copy several files from several different directories into xxx folder, gzip that files with date name for gzip and delete then that copied files and leave just gzip file with all that files in there. Also in script has to be included mtime command to delete gzip files older than 5 days (-mtime +3).

Basically, I want to copy random conf and ini files, and gziped in one folder.
I have full path for every file.

Thanks

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I ended up with classic cp files to new folder. Running with cron every 24 hours and backuped with rsnapshot to another backup server will be enough.
Because cp command will overwrite older files with new one, I do not need mtime to clear older one, and because files are so small in size, I do not need gziped.
Of course that I have hard time to chown script, and also edit eol to unix... new staff for me, but google answered me

In case that anyone need, this is my "bash script" to copy important (for me) conf and ini files, to have it just in case.

Code:

#!/bin/bash
/bin/cp /etc/logrotate.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/lib/php.ini /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/my.cnf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/redis.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/redis-sentinel.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/centminmod/custom_config.inc /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/centminmod/php.d/zendopcache.ini /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/centminmod/php.d/zzz_customphp.ini /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/csf/csf.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/elasticsearch/elasticsearch.yml /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /etc/logwatch/conf/logwatch.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/etc/php-fpm.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/nginx.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/php.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/drop.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/staticfiles.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/conf.d/virtual.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/conf.d/ssl.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/conf.d/pijanitvor.com.ssl.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/brotli_inc.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/maintenance.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup
/bin/cp /usr/local/nginx/conf/php-rediscache.conf /home/nginx/domains/pijanitvor.com/backup/conf_backup