Google for it (or any other search engine as I am using it as a Verb). Try Google Images. Also use Wikipedia.org as they sometimes have good pics. Also you might want to find out what series of G it is; as G-3, G-10, etc. The Luftwaffee experts here can ask the right questions about the features of your model. BTW, what model and scale is it?
WIP: Monogram 1/72 B-26 (Snaptite) as 73rd BS B-26, 40-1408, torpedo bomber attempt on Ryujo
Monogram 1/72 B-26 (Snaptite) as 22nd BG B-26, 7-Mile Drome, New Guinea
Minicraft 1/72 B-24D as LB-30, AL-613, "Tough Boy", 28th Composite Group