I have copied the extract below from the Gloucester Archives website. The only other source of information for this period is the Bishops Transcripts, I have had a quick look at these and they are not readable prior to 1612.

DocumentRef P227 IN 1/1
Title Baptisms, marriages and burials
Date 1560-1667
Description In addition to many missing entries due to the damaged state of the register, there are gaps in register, October 1587-June 1589, and 1599-1612 (apart from few entries, 1607-1608)
Few entries, 1643-1653