test.awk

#!/bin/sh

ls -l *.gz | \
awk '
{
    filename = $9;
    "date +%s"|getline current_timestamp;
    split(filename,components,"-");
    timestamp=components[1];
    if((timestamp + 6*60*60) < current_timestamp){
        printf "%s %s\n", timestamp, filename
    }
}'