My girlfriends mom doesnt like me for some reason and doesnt want me with my girl but my girl wnts to keep me?

my girls mom said she doesnt want her to have any contact with me because i have a gang history but my girl doesnt want to leave me because she kn ows im changing for the better for her. i want to stay with my girl but im also relly big on respecting parents. plus i live in fresno and my girl moved to san jose. wat should i do?