Hello FishnDave, have a look at this !

http://www.flyfishga.com/gar.htm

Looks like this guy knows what he's talkin' about I'd say. Hope this works for you. One thing though...in my google search I learned that if you lose a big gar with a rope fly tangled up in it's millions of teeth it will starve to death. The solution mentioned was to use a 50lb mono for a leader. I don't know how much sense that makes but that's what I noticed in one article about gar on the fly. Go get 'em !

Cheers,

MontanaMoose