"I believe it would be easier to travel with you if we took to the air. It may feel more comfortable for you to see things from up high?" Gil phrased it like a question but he was already taking to the air himself. What he hadn't done much or even shown was the challenging ability to also step on the air.
While Walker had the wind step, air step, and even wind manipulation skills along with others to fly, Gil had been trying to understand how to fashion a skill that copied the ways that the wind elves could walk through the sky but also make it better.
Make it a skill for him rather than just adopting it for himself like he had with other elven skills.
