Find positions of keyword in GZ'ipped file

I'm trying to identify parts of a MySQL DB that take most space in GZipped dumps that I need to frequently save and restore so that I can archive some tables partially. I have a suspicion that different tables are compressed better or worse depending on their content so their uncompressed size is not very relevant here. Is there any way I can map CREATE TABLE or INSERT statements in the DB dump to the file positions in the .sql.gz file? Something like gunzip where {0} is the current position of the db.sql.gz file that gunzip is reading from