It is not the first time pro Dalai Lama people to condemn the Dorje Shugden lamas but at the same time use the works of these masters, especially the works of Pabongka Rinpoche. It is very contradictory, but then again, their logic to ban this great Dharma Protector Dorje Shugden itself are contradicting, so there is nothing new too.
IMHO, Geshe Kelsang Gyatso is very well established and the hundreds of thousands of followers all cannot be fooled at the same time. His work is good, so why not? We should not discriminate works based on a deity alone.