In this case, you need to use AUTO_ONE_TO_MANY or MANUAL_ONE_TO_MANY channel type.
Let say you are using EP1 IN and EP2 IN as consumers and also assume that GPIF II has four buffers of data (buffer 0, 1, 2, 3) to send it to USB host. Then the buffers received on EP1 IN will be of the fashion: Buffer 0, Buffer 2 and so on. Buffers received on EP2 IN will of the fashion: Buffer 1, Buffer 3 and so on.
If you need same data on both EP1 IN and EP2 IN then you need to go for MULTICAST channel.