Gila is a large type of marrow with pale flesh that is more fibrous than other marrow varieties. Candied gila is a popular pastry filling, adding a unique crunchy texture to sweets. As it takes 2 days to prepare, you can make this ahead and freeze it in an airtight container lined with baking paper for up to 1 year. You will need a sugar thermometer.Gila is a large type of marrow with pale flesh that is more fibrous than other marrow varieties. Candied gila is a popular pastry filling, adding a unique crunchy texture to sweets. As it takes 2 days to prepare, you can make this ahead and freeze it in an airtight container lined with baking paper for up to 1 year. You will need a sugar thermometer.