Is it ok to use this eye texture ??

Hi guys
please help me, I got sick searching for an answers
( I’m sorry if this is not the right section, but I couldn’t find one for my question )
I wanna make a character for my game
I used this eye :

I’m gonna make my game but not with blender
but I used blender to make my char
I wanna sell the game when I finish
but IDK if that’s ok for this eye texture
I searched for answers but couldn’t find
I got into GNU GPL site and went into FAQ but still not sure
please help me

You should be good to go with this one.