To delete entries in the GSE queue, use the csschedule utility delete command.
For example, to delete all entries in the GSE queue:
csschedule -v delete
To delete the entry in the GSE queue for calendar calA with the first schedule time of 13:30:45 on 11/30/2001, an offset number of 1, the unique identifier 1111, the recurrence ID 0, and the sequence number 0:
csschedule -v -t 20011130T133045Z -o 1 -u 1111 -r 0 -n 0 delete calA