Hi Helen,
I've just done a search (5 years either side of 1805) using the Notts Baptism CD and, like Patrish, have found nothing for Gunthorpe, the nearest options being at Epperstone.
There are three Baptisms at Epperstone, two of which are probably for one set of parents:
Pearson John baptised 12.09.1802 Father: John Mother: Sarah Father's occupation: Labourer
Pearson John baptised 19.08.1804 Father: John Mother: Sarah
Pearson John baptised 03.03.1806 Father: William Mother: Anne
Hope this helps.
Kind regards,
Paulene
