How to parse several log nginx files using goaccess

Quoting the man page and assuming you have a Combined Log Format:

If we would like to process all access.log.*.gz we can do one of the following:

# zcat -f access.log* | goaccess --log-format=COMBINED

OR

# zcat access.log.*.gz | goaccess --log-format=COMBINED

On Mac OS X, use gunzip -c instead of zcat.