Both sides have identical records with two wins and one defeat in the new-look format.
And veteran former Athletic Bilbao star Garcia wants to dedicate a win to his devastated homeland, with the death toll upwards of 200 people.
The 34-year-old said: “What is happening in Spain is inexplicable and very bad.
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“The whole country, not just Valencia, should be better prepared. What happened was really unbelievable. We are devastated and surprised.
“It may not be a common weather phenomenon, but there should be preparation.
“I would like to give my love to all those affected and I will try my very best to win the Europa League match for Olympiacos and dedicate the win to those people.
“I have actually found playing in Europe easier because teams don’t sit in and defend like they do in Greece.
“So hopefully against Rangers, we can use our speed against them. Patience and pressure are the key. We know what we have to do.”
