Juvenile gars from 3inch to 6/7inch shud be offered feeders buffet if possible to beef them faster.
After which, u can train them to take pellets or market prawn by starving them.
Remember to net out the unfinish food daily.
Alligator gar is the easiet to train but florida gar shudn't take too long to accept prepared food also. I would say max 1wk of starving and you will see results.
agree with most of your post, except the starving part. what i usually do is to reduce the amount of live i give and consistently offer prepared foods. they will usually take it after some time.