R.Q.
Edited to add:
According to their website all of their dairy formulas contain lactose as an ingredient:
http://www.gerber.com/Products/Good_Start_DHA_ARA_Formula...
Their soy formulas however are lactose free.
Umm. . . why are you looking for a lactose free formula? If your child cannot digest lactose they would have been put on a specially designed prescription formula already--this would've been diagnosed within a week of birth. (This is rare--maybe one in 10,000 or less babies have this problem.)
If your child has a dairy sensitivity, they should not be drinking a milk based formula. Talk to your pediatrician about what to use. A soy based may suit you. There are also supposedly "hypoallergenic" formulas out there, but they cost a lot and if your child is highly allergic to something like corn, they may react to these as well. . . Other possibilities are alternative homemade formulas that are non-dairy, but you have to be really careful that they are nutritionally well balanced for your infant (not all the ones out there are, so only use these as a last resort and research them carefully while consulting a nutritionist.)