yep! just as in normal deployment at the start of the game, each infantry and/or command squad is an independant unit and can be dropped wherever you want! you simply deploy them all at the same time because all 3-6 units count as 1 FOC choice...
best bet is to try and deploy as many units as possible in the same general area for mutual support though... unlike marines, guardsmen obviously can take on the enemy unit for unit and win!
send 30-40 guardsmen to take care of a flank mind, and they'll clean it up quite nicely.
cheers!