Register now for FREE unlimited access to Reuters.comApril 23 (Reuters) - Four-time Olympic gymnastics champion Simone Biles has signed up with Gap Inc's Athleta brand for a new apparel partnership, ending an almost six-year deal with Nike Inc .Biles, the most decorated gymnast in world championship history at age 24, said in an Instagram post on Friday she wanted to partner with a brand that shares her "passion to help girls rise and own their limitless potential.""They are committed to diversity and inclusion, which was really important for me to see in a partner," she said.Register now...…Register now for FREE unlimited access to Reuters.comApril 23 (Reuters) - Four-time Olympic gymnastics champion Simone Biles has signed up with Gap Inc's Athleta brand for a new apparel partnership, ending an almost six-year deal with Nike Inc .Biles, the most decorated gymnast in world championship history at age 24, said in an Instagram post on Friday she wanted to partner with a brand that shares her "passion to help girls rise and own their limitless potential.""They are committed to diversity and inclusion, which was really important for me to see in a partner," she said.Register now...WW…