I think September/October is the best time of year to be in Gozo - sea still warm, and fairly quiet. I believe St Patricks do HB and FB, but there are several restaurants within a few minutes walk of the hotel - eating out - (in Maltese £ - MTL1 = £1.6, so 1.50 is about UK£2.50)
pizza 1.50-2.50
main course 2.50-5.00
beer 50c
if you have any specific questions about St Patricks, email the manager, Joe Camilleri, on stpatricks@waldonet.net.mt - mention Mark from Gozo SPCA, and I'm sure he will be very helpful (he's the chairman of Gozo SPCA, and I help out with fundraising)