According to http://home.clara.net/brianp/quickref.html a gill is 1/4 of an English pint, or 5 ounces.
the amount listed in recipe
Gill Watkiss has written: 'Gill Watkiss' -- subject(s): English Painting, Exhibitions, In art, Painting, English
Gilas گیلاس gil pronounced same as the English word 'gill' (like fish gill) as pronounced same as the English word 'us' gill-us
Half a cup
NHL player Hal Gill weighs 243 pounds.
Ricetta in Italian is "prescription" or "recipe" in English.
Depends on bow much it eats
ricetta
1 gill = 4 fl oz (US), 5 fl oz (British)
Based on your use of the English spelling of Litre and not the American spelling (liter), I'm going to assume imperial measures: 1 gill = ¼ pt = 5 fl oz ≈ 142.1 ml The standard measure for spirits in an English pub was 1/6 gill or 23.7 ml before "metrification" when it was made 25 ml or 35 ml (decided by the publican).
Recipe for madeira cake
It is known as the yield of a recipe which tells you how much of a product is made with the recipe you are given.