A good and easy way to remove gel ink from your clothing is to use some hand sanitizer.
The hand sanitizer works great at removing gel ink and ink from clothing and other fabrics.
Take the hand sanitizer and apply the alcohol based hand sanitizer to the gel ink stain and let it soak in for a few minutes.
Then after a few minutes wash the clothing in the hottest water allowed that your clothing can take.
Wash the clothing with detergent and ¾ cup Clorox® Regular Bleach and after washing the clothing
Allow the clothing to air dry and check to see if the stain was removed and if not you may need to do the same again or soak the clothing in some vinegar and baking soda and wash it again.
Sometimes you may need to soak the clothing overnight in vinegar and baking soda and your laundry detergent as well to get the gel ink out of your clothing.