I am trying to figure out how the GFS structure works I want a 7 day, 4 week, 3 month, 4 quarter, 1 year schema.
If you going to set up GFS like this, you will have restore points for 7 past days + last 4 weekly full + 3 monthly full + 4 quarter full backups and 1 yearly. Also remember that weekly, monthly, quarterly and yearly could be the same file if they scheduled on the same day of the week.
Maybe it will be helpful for you to plan storage capacity by using this Restore point simulator
According to your scheme, you need 7 days retention, BCJ interval set to daily and enabled GFS (4 weekly, 3 monthly, 4 quarterly and 1 yearly).