Here is a Posuk that starts with a Gimel and ends with an Aleph
איוב פרק-יג-ט"ז גַּם הוּא לִי לִישׁוּעָה כִּי לֹא לְפָנָיו חָנֵף יָבוֹא
Here is a nifty website where you can look up Pesukim that begin with a letter you desire and end with a letter you desire. There are some names that have a combo that does not exist. See here for what one can do in such an instance.