I think the emblem (badge) of Goju Ryu is partly that of the coat of arms of the Higoanna family (the outer circle and boundary structure) whilst the two interlocking three-sides (central) squares are a stylised expression of the Chinese yin-yang (taiji) symbol. There is also evidence that the inter-locking squares also represent the 'divine sky' and the 'broad earth' as described in the Classic of Change (Yijing) found in China. This symbolism all fits-in perfectly with a martial arts style which utilises 'hard' and 'soft' in both 'distinct' and yet 'integrative' fashion.