Are the transportation expenses to participate in a free raffle considered gambling?

As long as participation in the prize draw is free, this is a gift and a donation, not gambling. Gambling is a transaction in which one party wins and the other loses. The personal expenses incurred by the participant (such as driving a car) are unrelated to the prize and do not affect the ruling on the matter. Gambling would apply if there were participation fees or if something had to be purchased for the draw.