The organization began allowing gay youth in 2013 and ended a blanket ban on gay adult leaders in 2015. In 2017, it made the historic announcement that girls would be accepted as Cub Scouts as of 2018 and into the flagship Boy Scout program — renamed Scouts BSA — in 2019.
In the UK, The Scout Association went fully co-ed in 2007 and Girl Guiding remains a girls-only organisation. Both are doing just fine.
I appreciate the clarification, but I was curious how they avoid redundancy. Luckily, for anyone else who is curious, @MerrySkeptic@sh.itjust.works put a summary of their distinctions in a comment below.